New features, changes and fixes in gnuplot version 4.6.5
========================================================

* NEW monotonic cubic splines using "smooth mcsplines"
* NEW phase-jump removal filter "smooth unwrap"
* NEW allow '+' pseudofile to sample the T axis in 2D parametric plots
* NEW allow '++' pseudofile to sample the U/V axes in 3D parametric plots
* NEW "sixel" terminal driver
* NEW new object attribute clip/noclip
* CHANGE maximum number of using spec columns increased from 7 to 11
* CHANGE code in bitmap.c relicensed to remove restriction to noncommercial use
* FIX allow 'set pm3d' interpolate and top/bottom options to coexist
* FIX revised handling of defined palettes with explicit maxcolors
* FIX continue as normal after an interactive session error from "gnuplot -" 
* FIX empty first field in a tab-separated-values file was incorrectly ignored
* FIX several problems with color assignment to contour lines
* FIX qt terminal incorrectly changed linetype (dot/dash) to match line color
* FIX "pause mouse" worked only for right- or center- click, not left-click
* FIX emf terminal font initialization
* FIX wxt terminal vertical centering of enhanced text
* FIX win terminal filled polygon bugs
* FIX iteration over parametric function plots
* FIX autoscaling of polar mode plots
* FIX increase precision of xticlabel placement from (float) to (double)
* FIX allocation error affecting certain cvs files

New features, changes and fixes in gnuplot version 4.6.4
========================================================

* NEW Ctrl-Break interrupts fitting run in wgnuplot
* CHANGE treat empty fields in a csv file as "missing" rather than "bad"
* CHANGE allow reference to more than one column header in 'using' or 'title'
* CHANGE install-info is no longer a default "make install" target
* CHANGE if a polar plot is autoscaled, try to place the origin at the center
* FIX svg and canvas terminal mousing of inverted axis coordinates
* FIX emf failed to initialize font correctly on some systems
* FIX timedata columns can now be referred to via column(N) and column("HEAD")
* FIX qt terminal toggling of enhanced text elements in plot with labels
* FIX color/pattern generated for key entries of columnstacked histograms
* FIX hitting ^C twice forces temination of wxt session hung by lost X-server
* FIX win terminal failed to properly adjust plot border after window resize
* FIX several conditions in which macros were not expanded during command input
* FIX promote a string containing only digits to INTGR rather than CMPLX
* FIX 'set grid front' caused failure to initialize location of axis zero point
* FIX very poor precision in mouse coords reported by x11 in -persist mode
* FIX parsing of $# (the number of arguments in a "call"). It's not a comment!
* FIX memory leak of cropped images using pngcairo terminal
* FIX "lc variable" now iterates over linetype colors (not styles) as documented
* FIX rtics were sometimes drawn with length 0

New features, changes and fixes in gnuplot version 4.6.3
========================================================

* NEW space raises console for console mode gnuplot on Windows
* CHANGE -persist mode does not open text window of wgnuplot
* FIX -persist mode broken on Windows
* FIX -persist mode results in zombie process if using wxt terminal on Windows
* FIX suppression of color in linetypes after "set term ... mono"
* FIX synchronization of graphics and text color transitions in latex terminals
* FIX memory allocation of stats command applied to a large matrix

New features, changes and fixes in gnuplot version 4.6.2
========================================================

* NEW Allow the "bind" command to attach a user command to mouse button 1
* NEW hidden3d can handle occlusion by pm3d surfaces (as in hidden2.dem)
* NEW -d option from command line skips ~/.gnuplot initialization file
* NEW plot '<&N' plots from file descriptor N opened during shell invocation
* CHANGE "unset term" restores original default terminal (GNUTERM)
* CHANGE ignore extraneous trailing comma in a plot command
* CHANGE special case code for faster input of uniform binary matrix data
* CHANGE test for whether the session should be interactive or non-interactive
* CHANGE draw zeroaxis lines in the same layer as the grid and border
* CHANGE allow 2-column-only variant of yerrorbars (implicit x coord)
* CHANGE using "COLUMNHEADER" requires an exact string match
* FIX aquaterm rendering of rgbimage plot type
* FIX gd terminal fontsize change requested by set_font(",newsize")
* FIX qt terminal font metrics
* FIX qt terminal mouse tracking and resize events for persistent plots
* FIX x11 terminal sometimes failed to reset the line width
* FIX -persist option broken if configured without x11
* FIX -persist mode continued mousing of 3D "set view map" plots
* FIX reset parsing state after error in parsing string input
* FIX buffer overflow from very long tic label formats
* FIX broken handling of formatted input via 'using 1:2 "<format>"'
* FIX exit current command file from inside bracketed clause
* FIX estimation of space required for rotated x-axis tic labels
* FIX partial axis ranges (e.g. xrange [*:MAX]) when refreshing volatile data


New features, changes and fixes in gnuplot version 4.6.1
===========================================================

* NEW syntax hints inside Emacs gnuplot-mode
* NEW support tabulation (set table) of pixel values from image plot styles
* NEW support tabulation of variable color column
* CHANGE emf output modified for better compatibility with MS Office programs
* CHANGE canvas terminal loads appropriate font file for UTF-8 encoding
* CHANGE skip execution of empty iteration loops in set and do commands
* CHANGE build scripts modified to accommodate automake 1.12
* CHANGE new policy: objects given in screen coords are not clipped to graph
* CHANGE Draw the z-axis label at a fixed distance to the left of the z-axis
* CHANGE "unset object N" succeeds even if there is currently no object N
* CHANGE gnuplot.el: catch up with 10 year old syntax change in emacs/elisp
* FIX margin space required for rotated axis tic labels
* FIX check for NaN values in binary input
* FIX backslash handling in enhanced text strings
* FIX cairo terminals sometimes lost the line segment before a polygon
* FIX interactive toggle of multiplots in svg
* FIX failure to balance {} if an input file did not end with a newline
* FIX strlen() and substring operators correctly handle UTF-8
* FIX initialization of history when configured --with-readline=bsd
* FIX set term cairolatex pdf mono
* FIX palette-related corruption in some cairolatex output
* FIX preserve number of active call arguments across a nested call command
* FIX wxt terminal mutex protecting execution of the command list
* FIX apply clipping to the interior fill of circles and ellipses
* FIX corruption of weights used for plotting with smooth acsplines
* FIX skip columnheader line when applying "every" filter
* FIX handle out-of-range pm3d values when cb axis is set to log scale
* FIX top/bottom color distinction in hidden3d when not using palette/RGB colors
* FIX allow toggling on/off of more than 10 plots in windows terminal
* FIX color printing from windows terminal
* FIX set term win font ",<size>"
* FIX incorrect return for acos(x) when imag(x) > 0 (bug present since v3.7)
      incorrect return for asin(x) when imag(x) > 0 (bug in 4.4.4, 4.6.0)
      incorrect asinh(x) when real(x) < 0 && imag(x) == 0 (bug in 4.4.4, 4.6.0)
* FIX keep sufficient precision in canvas and svg coords to report time in msec
* FIX the input buffer was not always extended correctly inside a { clause }
* FIX some cairolatex set_color requests were being ignored
* FIX calculated value of kernel density mean and sigma
* FIX emf terminal dashed line support
* FIX qt terminal build/installation procedure on OSX
* FIX array overflow while processing rowstacked histograms
* FIX boxes containing transparent patterns in PostScript output 

New features, changes and fixes in gnuplot version 4.6
======================================================

* NEW individual plots can be toggled on/off by clicking on the key sample
    (wxt, svg, canvas, qt, win)
* NEW syntax allowing column selection by matching a string in the first line
* NEW syntax supporting multi-line blocks of code delimited by curly braces
    if (<cond>) { ... } else { ... }
    do for [...] { ... }
    while (<cond>) { ... }
* NEW summation expression:   sum [<var> = <beg> : <end>] <something>
* NEW nested iteration e.g. "plot for [i=1:5] for [j=1:5]"
* NEW explicit justification for tic labels, e.g. "set xtics right"
* NEW time formats can handle fractional seconds (microsecond precision)
* NEW time() function returns current time
* NEW hidden3d supports "with impulses"
* NEW hidden3d supports arrow style parameters for "with vectors"
* NEW user-definable linetypes
* NEW plot style "with boxplot"
* NEW plot style "with circles" allows start/end angles for each arc
* NEW plot style "with ellipses"
* NEW plot style "with fillsteps"
* NEW qt terminal driver 
* NEW epscairo terminal driver
* NEW context terminal driver
* NEW cairolatex terminal driver
* NEW variable (per-data point) color for additional plot styles
* NEW "set key opaque" produces a key with an opaque background
* NEW ISO-IEC-80000 prefixes (ki Mi Gi etc) available as gprintf formats %b %B
* NEW encodings cp950 cp1251
* NEW option "set fit quiet"
* NEW option "kdensity2d" for two-dimensional kernel density plots
* NEW configuration option --without-bitmap-terminals (see note in INSTALL)
* NEW polar mode raxis, rtics, rrange, log-scaling, bounded filledcurves
* NEW Shift-JIS encoding recognized by postscript, gd, svg, and win terminals
* NEW windows terminal supports encodings
* NEW mouse tracking for SVG terminal
* NEW tab-completion for builtin readline
* NEW windows terminal can save graph as EMF file
* NEW cubehelix scheme for color palettes
* NEW localisation support for Windows help and menu file
* NEW Windows installer
* NEW shared initialization file $GNUPLOT_SHARE_DIR/gnuplotrc
* FIX length estimation of UTF-8 strings
* FIX accurate placement of color boundaries in the colorbar
* FIX Built-in readline handles UTF-8 encoding
* FIX asin(sin(z)) == z for complex z
* FIX default configuration does not initialize from ./.gnuplot
* CHANGE 3D zoom using middle mouse button is now a logarithmic response
* CHANGE 3D impulses are now always drawn from z=0
* CHANGE remove vestigial code supporting Amiga, Apollo, and 16-bit MSDOS/WIN
* CHANGE remove obsolete drivers unixplot and gnugraph
* CHANGE extend formats x/X/o/O to 64 bits if necessary to represent the value
* CHANGE "set palette maxcolors" no longer fights with "set palette defined"
* CHANGE javascript support for HTML5 canvas does not use global variables
* CHANGE Built-in readline DEL recognized as forward-delete (system-dependent)
* CHANGE Built-in readline ^W deletes previous full or partial word
* CHANGE wgnuplot text window supports wrapping of long lines
* CHANGE new Windows help file format (chm)
* CHANGE copy graph to clipboard as enhanced metafile in windows terminal
* CHANGE improved windows terminal driver
* CHANGE hidden3d top/bottom surface colors taken from linetype, not line style


New features, changes and fixes in gnuplot version 4.4
======================================================

* NEW CANDLESTICKS accept an option 6th input column specifying width
* NEW point property 'pointinterval'
* NEW gnuplot.exe is a full-featured console mode gnuplot executable for Windows
* NEW plot style "with circles"
* NEW object types circle, ellipse, and polygon
* NEW options front and back to "set colorbox"
* NEW x11 can plot into a window opened and managed by an external application
* NEW gd terminal can use fonts through fontconfig (libgd version > 2.0.35)
* NEW optional 3 columns of data to generate histogram errorbars
* NEW 'volatile' data, including inline data, can be replotted without rereading
* NEW 'refresh' command replots without rereading data if possible
* NEW rgbimage style now works in 2D and 3D for all terminals that support RGB
* NEW plot style rgbalpha 
* NEW transparent fill styles
* NEW iteration within a plot command; e.g. plot for [i=1:10] foo(i)
* NEW iteration with set/unset commands
* NEW operators '=' and ',' in expression syntax
* NEW terminal lua generates commands for interpretation by external lua script
* NEW terminal tikz uses a lua script to generate output for latex TikZ package
* NEW terminal canvas for HTML 5 canvas element
* NEW terminal pdfcairo based on cairo and pango
* NEW terminal pngcairo based on cairo and pango
* NEW terminal dpu414 - Seiko DPU-414 thermal printer
* NEW error status variables GPVAL_ERRNO and GPVAL_ERRMSG
* NEW variables GPVAL_LAST_PLOT, GPVAL_{S}PLOT, GPVAL_MULTIPLOT
* NEW variables GPVAL_VIEW_{MAP|ROT_X|ROT_Z|SCALE|ZSCALE}, GPVAL_TERMINALS
* NEW variables GPVAL_PWD
* NEW per-plot export of information needed for external mousing scripts
* NEW support for dashed linetypes in additional terminals
* NEW the 'bind' command accepts non-keyboard triggers, e.g. 'close'
* NEW commands 'show bind' and 'reset bind'
* NEW individual plots can be omitted from autoscaling of axis ranges
* NEW more smoothing options: new kernels (for dgrid3d) and 'smooth cumulative'
* NEW command 'evaluate' executes commands from a string variable
* NEW z-axis tic labels can be colored by Z value
* NEW command 'set view equal {xy|xyz}' forces axes in a 3D plot to the same scale
* NEW 'set pm3d interpolate m,n' supports also non-positive m,n as nbs of points
* FIX domain restrictions on ibeta()
* FIX remove the limit of 64 characters read as string data from a data file
* FIX remainder of command line is not lost after a "load" command
* FIX more complete support for locale internationalization, UTF-8 encoding
* FIX various font-handling problems in postscript terminal driver
* FIX avoid infinite loop on resizing x11 plot window under ion, fluxbox
* FIX handle addition plot styles in mode 'set table'
* FIX purge tick labels read from a datafile at the end of each plot
* FIX 2nd colour in the colour box for negative palette in postscript
* FIX interpolatation for pm3d surfaces given by both z and colour coordinates
* FIX 'set datafile binary format=...' was documented, but not implemented
* FIX enhanced text mode treatment of UTF-8 characters
* CHANGE A number that begins with a . must continue with a digit
* CHANGE syntax of 'set datafile binary' array= and record= options
* CHANGE 'reset' does not affect locale, encoding, decimalsign settings
* CHANGE 'set key textcolor rgb variable' will use plot colors for key entries
* CHANGE Remove obsolete IRIS4D terminal type
* CHANGE Remove obsolete atari terminal types (atariaes atarivdi multitos)
* CHANGE Use empty/solid fill for candlesticks rather than empty/striped
* CHANGE 'l' and 'L' hotkeys toggle colorbar logscale iff mouse is in colorbar


Features, changes and fixes in gnuplot version 4.2
==================================================

Below you find a list of news, changes and fixes in gnuplot version 4.2.

Please see also section "What is New in Version 4.2" in gnuplot documentation
(files gnuplot.gih, gnuplot.hlp, gnuplot.inf, etc.) available by the command
    gnuplot> help new
from gnuplot 4.2. You may find it also in files gnuplot.pdf, gnuplot.html
or gnuplot.info optionally available in your distribution, or online at
    http://www.gnuplot.info/docs/gnuplot.html#What_is_New_in_Version_4.2

* NEW autogenerated read-only variables prefixed GPVAL_ and "show variables all"
* NEW Japanese language documentation - FAQ and User Manual
* NEW multi-platform and interactive wxWidgets terminal
* NEW windows terminal supports enhanced text mode
* NEW support for placement of individual rectangles within plot or canvas
* NEW command "set style increment user" allows customization of default lines
* NEW commands raise and lower
* NEW y and y2 axis label rotation can be explicitly controlled (2D plots only)
* NEW {no}enhanced flag can be applied to individual labels
* NEW suboption 'set pm3d interpolate' for bilinear interpolation of surfaces
* NEW 3D plots can read RGB color triples as part of input data
* NEW write command history file also for gnuplot's readline
* NEW more versatile key placement and arrangement
* NEW 'splot x*y with pm3d' no longer requires prior 'set pm3d'
* NEW store a sequence of plots to an animated gif (requires libgd > 2.0.28)
* NEW multi-byte font support in x11, controlled by the locale setting LC_CTYPE
* NEW control decimal sign conventions using locale setting LC_NUMERIC
* NEW pstex, pslatex and epslatex terminals share functionality with postscript
* NEW suboptions "set pm3d corners2color min|max"
* NEW suboption  "set pm3d depthorder" does hidden-surface removal (sort of)
* NEW linetype colors via "lt {palette {frac <val> | cb <val>}}"
* NEW linetype colors via "lt {rgbcolor {"name" | "#RRGGBB"}}"
* NEW palette and rgb linetype colors apply to all 2D and 3D plot elements
* NEW user defined variables can contain strings
* NEW expression evaluation can manipulate and return strings
* NEW built-in string functions sprintf, gprintf, substr, strstrt, word, words
* NEW built-in string function system("shell command")
* NEW command line macro expansion   @<stringvariablename>
* NEW automatic variable $# expanded to number of arguments after "call"
* NEW reading of (almost) arbitrary image binary files
* NEW plot styles "with image" and "with rgbimage"
* NEW plot style "with labels" reads text data along with X/Y/Z coordinates
* NEW plot style "with histograms" creates clustered or stacked histograms
* NEW auto-layout of multiplot using "set multiplot layout <rows>, <cols>"
* NEW variant of plot "with filledcurves" that fills the area between two curves
* NEW variant of "with filledcurves" that fills only above or below the curve
* NEW using options {x|y|z}ticlabels(<col>)
* NEW option to read plot title from data file: set key autotitle columnheader
* NEW command 'set termoption <foo>' changes single property of current terminal
* NEW png driver supports antialiasing and TrueColor images
* NEW encoding koi8-u
* NEW plot style "with vectors" applies to both 2D and 3D plots
* NEW plot style "with points" can read variable point size from input file
* NEW "set tics" can change most settings for {x|y|z|cb}tics at once
* NEW tic scale can be set per axis using "set {x|y|z|cb}tics scale"
* CHANGE history file is written by default
* CHANGE PostScript prolog and character encoding files now maintained separately
* CHANGE Placement of z-axis label in 3D plots is now equivalent to x and y axes
* CHANGE "set ticsscale" is deprecated, use "set tics scale" instead
* CHANGE gnuplot on x11 has mousing always enabled on startup
* CHANGE 'set datafile fortran' is now required in order to read D or Q constants
* CHANGE let the string in '{s}plot ... notitle "string"' be silently ignored
* CHANGE libgd versions 2.0.28+ support GIF images as well as PNG/JPEG
* CHANGE remove old (non-libgd) GIF and PNG drivers
* CHANGE X-resource gnuplot*ctrlq:on requires <ctrl>q to kill plot window
* CHANGE X-resource gnuplot*exportselection:off disables plot->clipboard export
* CHANGE prefer use of offset keyword in 'set [xyz]label "foo" offset -1,-1'
* CHANGE 'set table "outfile"; ...; unset table' replaces 'set term table'
* CHANGE 'defined(foo)' is deprecated; new syntax is 'exists("foo")'
* FIXED empty datafiles are not a fatal error
* FIXED setenv GNUTERM now works for png, jpeg, and gif drivers
* FIXED PostScript output can be restricted to Level 1 compatible features
* FIXED emf output is compatible with MSWin XP SP 2
* FIXED limit size of X11 requests to half the maximum allowed by the X display
* FIXED arrowheads drawn in solid lines even if the shaft is dotted (PostScript)
* FIXED estimate true effective length of strings in enhanced text mode
* FIXED clipping of filled curves


Changes between gnuplot versions 3.7.2 and 4.0
==============================================

Below you find list of news, changes and fixes in gnuplot version 4.0
and older.

Please see also section "What is New in Version 4.0" in gnuplot documentation
(files gnuplot.gih, gnuplot.hlp, gnuplot.inf, etc.) available by the command
    gnuplot> help new
from gnuplot 4.0. You may find it also in files gnuplot.pdf, gnuplot.html
or gnuplot.info optionally available in your distribution, or online at
    http://www.gnuplot.info/docs/gnuplot.html#What_is_New_in_Version_4.0


Mouse and hotkey support in screen terminals

  The pm, x11, ggi and windows terminals support interactive work with mouse
  and hotkeys. The usage of the mouse is mainly self-explanatory. Just type 'h'
  in the graph window (hereafter we mean either PM, X11, ... terminal window)
  and a short overview of commands will pop up. The mouse is turned on and off
  with the hotkey 'm'. See 'help mouse' and 'help bind' for more details.

  The coordinates of mouse clicks are exported to variables MOUSE_X, MOUSE_Y,
  MOUSE_X2, MOUSE_Y2, and MOUSE_BUTTON accessible from the gnuplot command
  line. This allows gnuplot scripts to alter their behaviour based on
  interactive mouse input. See 'help mouse variables' and 'help pause mouse',
  and the example script demo/mousevariables.dem. Further it allows interaction
  of a gnuplot mouseable terminal and external programs in C, Python, Octave,
  etc. using gnuplot as their graph engine. This is demonstrated on gnuplot web
  page in section "Programming interfaces - bidirectional interaction".


Brief list of news in gnuplot 4.0:

* CHANGE sample calculated "smooth csplines" only in actual xrange
* CHANGE 'set term gif' compile-time option to write PNG format instead
* CHANGE pattern fill styles are uniform across all supporting terminals
* CHANGE X-window plot and font size is used to adjust plot layout
* CHANGE 'set key {on|off|default}' is preferred method for controlling key
* CHANGE mouse position is tracked in all X windows (not just current one)
* NEW enhanced text mode for additional terminal types
* NEW built-in function 'defined(<variablename>)'
* NEW mouse input information is exported to user-accessible variables
* NEW 'set term png' and 'set term jpeg' using modern GD library
* NEW set size ratio now works for splots, too
* NEW grid options: {layerdefault | front | back}
* NEW plot option "smooth frequency"
* NEW terminal names now sorted alphabetically
* NEW "with palette" also for points
* NEW plotstyle "with filledcurves"
* NEW 'set style fill' applies to boxes, boxxyerror, boxerror, candlesticks
* NEW "set boxwidth <number> relative"
* NEW options to FIG terminal driver
* NEW parse errors in datafile reading now show the culprit
* NEW labels can be printed attached to a point
* FIXED interaction of "set xtics <incr>"  with time/date axes
* FIXED candlesticks now ignore order of high/low entries
* FIXED keeping old arrow options if new "set" command modifies it
* FIXED undoing a mouse zoom that started from autoscaled axis
* FIXED contour line colours in pm3d's "with palette" mode
* FIXED PostScript stack pollution caused by "Symbol Oblique" patch
* FIXED warnings from perl -w in tkcanvas terminal output
* FIXED dgrid3d floating point exception
* FIXED logscaled colorbox axis
* FIXED pgnuplot for Windows NT/2K/XP


Time-organized list of news until gnuplot 4.0:

[3.8k]
* NEW let gnuplot on windows support -persist option
* NEW encoding koi8-r
* NEW 'set term x11 title "title"' and 'set term x11 close'
* NEW 'test palette'
* NEW 'set palette palette <n>' options {float|int} and output to that of
  'set print'
* NEW enhanced text mode for x11 gd pdf and dumb terminals
* UPDATED aquaterm terminal driver (Mac OS X). Requires AquaTerm 1.0 or later.

[3.8j]
* NEW 'show palette fit2rgbformulae'
* NEW 'set datafile commentschars {"<chars>"}'
* NEW 'set datafile separator {whitespace | "<char>"}'
* CHANGE terminal provided by openstep is called "openstep", not "next"
* CHANGE terminal provided by gnugraph is called "gnugraph", not "unixplot"
* NEW pm3d option corners2color
* NEW PM3D support for pstricks terminal
* NEW configure option --with-gihdir to specify location of .gih file
* NEW aquaterm terminal driver, for MacOS X

[3.8i]
* NEW 'set style arrow' and back angles for arrow heads.
* NEW option 'set view map'
* NEW encapsulate PFA, PFB, TTF font file definitions into postscript files:
  option `set terminal postscript ... fontfile`
* NEW command 'set fontfile'
* NEW color modes for pm3d, see `help palette`
* NEW option `set terminal postscript ... palfuncparam`
* NEW set key {no}autotitles
* NEW arbitrary text rotations; 'set label ... [no]rotate [by] ...'
* NEW set arrow ... filled | nofilled ...
* NEW set title ... textcolor ...
* NEW set [x|y|z|cb|...]label ... textcolor ...
* NEW set label ... textcolor ...
* NEW show plot add2history
* NEW explicit coloring of splots ... with lines|points palette according to
  the 4th column in the data file
* NEW pm3d option {no}ftriangles
* NEW splot ... with pm3d {at option}
* CHANGE pause supports subsecond time resolution (on systems supporting it)
* CHANGE "configure --with-x11-driver" and "set term x11 driver" removed.
* CHANGE gnuplot_x11 now goes to $pkglibdir/$version, not $bindir
* NEW environment variable GNUPLOT_DRIVER_DIR to override that path
* NEW set log cb - since now, z and cb axes are completely independent
* NEW set decimalsign
* NEW set key {no}enhanced
* NEW pm3d splots support independent z and color coordinates according to an
  optional 4th column of using
* NEW X11 can rotate text

[3.8h]
* NEW set key height <height>

[3.8g]
* CHANGE set label with any line type (colour), point type and point size
* CHANGE use either two or five minitic steps, never 4 (in logscale)
* CHANGE reject candlesticks/financebars plots of to few colums --- warn
  and then plot with "points", instead
* NEW Hotkeys to access clipboard in MS Windows version
* NEW set style [data | function] filledcurves {options}
      plot ... with filledcurves {options}
* NEW autoscale options: `fix`, `keepfix`
* NEW some more fancy 3D demo plots
* NEW mouse support and PM3D are now enabled by default
* NEW more point symbol types in Windows terminal
* FIXED PostScript font reencoding for non-default fonts
* FIXED dgrid for logscaled axes
* FIXED tic generation for axes that have |min/max| very close to 1
* FIXED several "impossible" parse erros in "show" command.
* FIXED bounding box of PSLatex generated .eps files
* (attempted) FIX: X11 deadlocks caused by stdio buffering vs. select()
* FIXED baseline of "histeps" plots with logscaled or shifted y axis.
* FIXED document spherical coordinates by reference to latitude/longitude
* FIXED warn about missing HOME directory only in interactive mode
* FIXED tpic terminal coordinate handling

[3.8f]
* NEW pipes under Windows (if compiled by MingW)
* NEW PDF terminal driver --- needs PDFlib
* NEW SVG terminal driver
* NEW epslatex & EMF terminal drivers now always built in
* NEW PM3D support for CGM, GGI and tgif terminals
* NEW PM3D "set palette maxcolors" support for X11 and PostScript
* NEW special maths function lambertw()
* NEW axis for the color box
* NEW encodings ISO-8859-2 and CP-852 for PostScript terminal
* NEW PM terminal uses codepage 912 for	iso_8859_2 encoding
* NEW "index" option for "matrix" type datafiles
* NEW commands 'set term push' and 'set term pop'
* NEW much extended EEPIC terminal driver
* NEW implement "clear" for Windows and OS/2
* NEW option "picsize" for PNG terminal
* NEW mouse support for MS Windows
* FIXED endless loop if both 'set timefmt' & 'set xtics <incr>'
* FIXED detection of too new gd library without GIF support
* FIXED interaction of autoscaling and "set size ratio"
* FIXED PM3D allocated too many colors for multiplots
* FIXED key sample line types in contour plots
* FIXED timefmt parsing of "01Dec2000" vs. Fortran doubles
* FIXED MS Windows pause box eating 100% CPU
* FIXED ooold problem with HP-UX GCC breaking tic positioning
* FIXED positioning of multiplots
* FIXED correct rounding of exponents for %[SLT] --- needs %s to come first
* FIXED ticmarks for very short axes (max - min < DBL_EPS)
* FIXED "show ticslevel" and "show ticscale"
* FIXED parse errors after "set xdata time"
* FIXED MSDOS file corruption if re-opening same "set output"
* FIXED reject many-column plot styles when plotting a function

[3.8e]
* NEW Major new feature "pm3d" for color plotting (formerly a branch version)
* NEW set label can print numbers into the label text
* NEW hidden3d allows non-grid datasets to be part of the plot
* NEW hidden3d works with contour lines
* NEW overprinting feature for PostScript revised
* NEW Windows terminal now has linewidth support from inside gnuplot
* NEW table terminal will output additional colums some plot styles
* FIXED hidden3d display of tics and axes

[3.8d]
* NEW <Space> in Windows graph window beams focus to text window
* NEW point sample and offset options for "set label" 
* NEW relative endpoints and choosable head shapes for "set arrow"
* NEW interactive inline data input now has a prompt
* NEW terminal driver epslatex --- like pslatex
* NEW terminal driver GGI
* NEW experimental driver for Enhanced Metafile Format (EMF)
* NEW %s timefmt for reading seconds since the epoch
* FIXED Pslatex actually changes the fontsize
* FIXED PSTRICKS and EEPIC bounding box
* FIXED output of filenames in enhanced-text terminals
* FIXED reading of ~/.Xdefaults
* FIXED block mouse-generated replot if inline data in use
* FIXED 3D clipping of "key below" or "outside" samples
* FIXED zeroaxes bug introduced by vector clipping
* FIXED bug with "smooth unique" inrange/outrange conditions
* FIXED autoscale writeback bug (see BUGS entry 3)
* FIXED png parser bug
* FIXED buggy `show m[xyz][2]tics' command
* FIXED bug in `show key' if key is boxed
* FIXED building on VMS
* FIXED bug in 3d plot introduced by mouse code 
* terminal-dependent configuration of GNU readline
* updated FIG terminal driver to new file format version

CGM terminal mods:
* NEW: files are now compliant with MIL-D-28003A.
* NEW: Standard font table now includes the standard WebCGM fonts and
  the Hershey fonts.  Gnuplot knows the widths of the standard fonts.
  Default font is now "Helvetica Bold".  New fonts can be added to the
  table without deleting the standard ones.
* NEW: open markers.  yellow removed due to poor visibility.  Orange
  and gray added.  User can specify new line colors.
* UPDATE: "winword6" option is now just a deprecated synonym for
  "nofontlist".
* FIXED: Font height handling (e.g. crowded keys)
* FIXED: "solid" option.
* FIXED: linewidth changes were sometimes applied to the wrong lines.

[3.8c]
* NEW mouse support for OS/2 and X11
  - --enable-mouse option
  - --with-X11-driver option
  - new commands "bind", "set historysize", "set mouse",
    and "set label [no]pointstyle".
* NEW configure.vms script for VMS
* NEW oblique symbol font for ps driver
* NEW introduce pipe for load command gnuplot> load "< ...".
* FIXED typo in save xrange
* FIXED defunct 'unset [xyz]tics' commands
* FIXED segfault in pslatex driver
* FIXED crash in OS/2 REXX code
* FIXED crash in fit code
* FIXED bug in 3d plot size after setting nokey
* FIXED bug in postscript epsf option
* don't put pslatex's postscript code into preamble, as this will
  only use the settings for the last picture if several pictures
  are present
* the results of unset border and unset clabel are different
  from reset

[3.8b]
* retain backwards compatibility for old syntax
* ongoing work: modularisation
* NEW, improved version of hidden3d code
* --enable-history configure option renamed to --enable-history-file
  to avoid mixup with new 'history' command
* fix to find gethostbyname(3) on LynxOS
* added new implementation of hidden3d code
* FIXED png driver now shares web-friendly palette with gif driver;
  also new transparency option and user defined colour specs
* FIXED data format for table driver
* FIXED monochrome plots with Windows driver
* FIXED bug in contour handling
* FIXED clipping of contour input points outside fixed ranges
* FIXED bug in coordinates saving
* history command now works with GNU readline
* implemented vector style clipping for 2D plots
* UPDATED gnugraph driver now requires plotutils 2.2+
* UPDATED platform makefileS
* UPDATED hpgl driver
* UPDATED FAQ

[3.8a]
* doc2texi.el, gnuplot.texi added; remove doc2info.c,
  doc2html.c, doc2texi.pl, and fixinfo.el; the info
  and html files are now created with makeinfo, the
  latter requires makeinfo (GNU texinfo) 4.0
* FIXED the 'set ?range' commands now use a decimal point
  to prevent integer overflow on 16 bit platforms
* FIXED 'save'd files are now consistent with the new syntax

[3.7.0.10 - internal only]
* removed DJGPP version 1 support
* improved version of stdin wrapper for Win32
* ongoing work: rewrite of input parser
* gnuplot now passes the correct return value back to
  the environment
* FIXED buffering bug in gnuplot_x11
* FIXED crash in 16bit Windows
* FAQ updated
* FIXED some inconsistencies in error messages and the manual
* INCOMPATIBLE CHANGE: the 'set data style', 'set function style'
  and 'set linestyle' commands have been removed. They have been
  replaced with 'set style data|function|line'. The 'set nolinestyle'
  command, however, is still available for the time being.
* NEW 'system', 'unset' command
* INCOMPATIBLE CHANGE: all 'set noVariable' commands have been
  replaced with the new 'unset Variable' command.
* NEW 'save term' option
* FIXED building on NeXT
* NEW 'history' command, by Petr Mikulik. Currently works only
  without GNU readline.
* FIXED gnuplot now checks for minimum and maximum of required columns
  in data plots
* UPDATED VMS build procedures
* gnuplot-mode updated to 0.5j
* FIXED reversed 'set {x|y}zeroaxis' behaviour
* FIXED plotting of test page before line properties are specified completely
* UPDATED metapost driver
* better modularisation

[3.7.0.9]
* moved some declarations to new header files
* more static arrays removed or replaced with malloc'd storage
* duplicate functions removed
* driver for OpenStep/MacOS X server now complete
* FIXED bug in plot positioning with multiplot
* FIXED bug in J. Pepin's layers patch
* FIXED bug in M. Gardner's help formatting patch
* FIXED definition of ANSI_C on autoconf platforms
* FIXED argument passing to gnuplot_x11 on VMS
* NEW `save' command now accepts "-" as filename, "saving" to stdout
* INCOMPATIBLE CHANGE: "%y" date specifiers are now interpreted according
  the recommendations of The Open Group. When a century is not otherwise
  specified, values in the range 69-99 refer to the twentieth century and
  values in the range 00-68 refer to the twenty-first century.

[3.7.0.8]
* embedding document font is now default font in latex output
* static limits for user defined function and variable names removed
* 'make check' now passes GNUTERM from the command line to gnuplot.
* FIXED off-by-one error in gif driver y-scaling
* gnuplot-mode updated to 0.5g
* FIXED errors in 'set view <z_scale>'. Related demos have
  been updated too.
* src directory now uses automake Makefile
* #error and #warning directives have been removed.
* more efficient way of building docs/allterm.h
* FIXED auxiliary ps filename generation in pslatex driver

[3.7.0.7]
* FIXED timestamp positioning problem in X11 terminal
* FIXED exit/quit in batch files now works as documented
* FIXED 'replot' with no args does not discard rest of
  ';' separated command line anymore
* no more fixed limit to the number of contour levels,
  now allocated dynamically
* improvements in the OS/2 mouse driver
* backtic command substitution now works inside quoted strings
* NEW driver for metapost output
* NEW driver for openstep/MacOS X Server
* NEW perltk driver integrated into tkcanvas driver
* NEW loadpath feature, uses GNUPLOT_LIB env var
  see 'help environment' and 'help loadpath'
* updated to version 0.5f of gnuplot-mode
* CHANGE in command line substitution:
  Newlines in the output produced by the spawned command are
  stripped. They are NOT replaced with blanks anymore. This is
  a possible source of incompatibility.
* CHANGE gnuplot's error and warning functions now accept a
  variable number of arguments. On platforms without vfprintf
  or doprnt, the number of format-dependent arguments is
  limited to 8.

[3.7.0.6]
* Petr Mikulik's OS/2 mouse patch integrated
* 'make check' now runs demos non-interactively
* Linux SVGA driver: don't drop root priviledge until VGA is initialised
* LaTeX tutorial updated for LaTeX2e
* gnuplot-mode updated to 0.5e
* old patches for postscript driver integrated:
  different colours for key text and sample (blacktext),
  linewidth, dashlength options
* extensions to tkcanvas driver
* fixes in fig and metafont drivers
* bugfixes related to secondary axes (show/nologscale)
* new '--without-lisp-files' and '--without-tutorial' configure options
* new targets to build documentation with groff
* quoting bug fixed 
* new files VERSION, PATCHLEVEL, README.exp

[3.7.0.5]
* another off-by-one error fixed in pstricks driver
* updated to latest version of gnuplot-mode
* added tilde-expansion of filenames
* win/pgnuplot.c added, stdin redirection for gnuplot
  under Windows
* extended interactive Tk/Tcl capabilities
* only read from stdin if the complete filename is "-"
* added fitting of time format data
* workaround for the bug that made 'set key below' sometimes
  lack some of the key texts
* build lisp files, LaTeX tutorial only if emacs, latex, resp.
  are found
* moved CVS repository to new dir structure
* gnuplot can now be compiled with GNU libplot 2.2
* docs/doc2hlp.com renamed to docs/doc2hlp.vms pending better solution

[3.7.0.4]
* switched to new directory structure!
* fix to plot all lines in multiline labels within plot borders
* hardwire terminal sources into docs/Makefile.in
* better docs for 'set missing'
* hopefully complete fix for off-by-one error in pslatex driver
* fix core dump in alloc.c (only relevant for memory debugging)

[3.7.0.3] (released as patch only)
* brush up the various platform makefiles
* typo in plot.c free() statement fixed
* some fixes in the Be driver

[3.7.0.2]
* add pgp keys
* NEW driver for BeOS
* X11 driver now uses ececvp() instead of execl()
  to eliminate intermediate shell process
* NEW gnuplot-mode.el for X/Emacs
* update to OS/2 REXX interface
* more drivers enabled by default under OS/2
* Bezier interpolation rewritten to prevent overflow
* Windows linestyle fixed
* introduce layers (front, back) for labels and arrows
* tiny and giant fonts added to gif driver
* tilde expansion; (does not work for "cd" and "set output")
* GNU readline related:
    new syntax for --with-readline option in configure
    no more duplicate history entries
    use gnuplot history file
* SECURITY: --with-linux-vga=no is now default
* SECURITY: better control when Linux executable with
  SVGAlib access actually runs as root
* SECURITY: potential risk fixed in iris4d terminal
* EXPERIMENTAL: new --enable-thin-splines option in configure
  to enable thin plate splines in plot3d.c
* configuration: --enable-apollo, --enable-gpr and --enable-unixpc
  options removed, related code is now in syscfg.h.
  --enable-cgi and --enable-sun options removed, now automatically
  detected at configure time. --enable-system-time option removed.

[3.7.0.1]
* bug fix for negative aspect ratio
* bug fixes in the cgm, eepic, png, and pslatex driver
* bug fix in the data fitting code
* bug fixes for HP-UX, NEXT, and Windows
* bug fixes for save and set lmargin commands
* better makefile for Amiga SAS/c