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<H3><A NAME="SECTION001014100000000000000"> </A>
<A NAME="8261"> </A>
<BR>
Plotting and overplotting axes
</H3>
The command <TT>PLOT/AXES</TT><A NAME="8263"> </A> offers the
users the possibility to draw a frame with certain ranges in x and y.
The command is very flexible, since it accepts both the ranges in x and y
and the scaling factors as input parameters. Also, the user has the freedom
to select the location where the frame is to be drawn. The actual data
points can be plotted with subsequent overplot commands (see example below).
More coordinate boxes can be plotted using the command <TT>OVERPLOT/AXES</TT>
<A NAME="8265"> </A> with the same parameter list as
in the <TT>PLOT/AXES</TT> command. In the example below a series of plots
is produced with plot and overplot commands. First, we start with a
<TT>PLOT/AXES</TT> and an <TT>OVERPLOT/TABLE</TT> command, and then continue
with three <TT>OVERPLOT/AXES</TT> and <TT>OVERPLOT/TABLE</TT> commands. The
result is four graphs in the graphics window.
<BR>
<B>Example:</B>
<BLOCKQUOTE>
<TT>assign/graph g,0 </TT><<TT><7962>>! assign graphic window 0 <BR>
plot/axes 0,10 -1,1 -50,-70,10,80 </TT>! plot the first axes<TT> <BR>
overplot/tab example ? #1 </TT>! plot first coord. box<TT> <BR>
overplot/axes 0,10 -1,1 -50,-70,70,90 </TT>! overplot second box<TT>
<BR>
overplot/tab example ? #2 <BR>
overplot/axes 0,10 -1,1 -50,-70,130,90 </TT>! overplot third box<TT> <BR>
overplot/tab example ? #3 <BR>
overplot/axes 0,10 -1,1 -50,-70,190,90 </TT>! overplot fourth box<TT> <BR>
overplot/tab example ? #4
</TT></BLOCKQUOTE>
<P>
Alternatively, the system also offers a more simplier way of doing the
same thing: instead of the <TT>PLOT/AXES</TT> and <TT>OVERPLOT/AXES</TT>
commands we switch off the clearing of the graphics window first
and continue with simple <TT>PLOT/TABLE</TT> commands. <BR>
<B>Example:</B>
<BLOCKQUOTE>
<TT>clear/graph
<BR>
set/graph clear=off </TT>! erase switched off<TT> <BR>
plot/tab example ? #1 -50,-70,10,10 </TT>! plot the fifth box<TT> <BR>
plot/tab example ? #2 -50,-70,70,10 <BR>
plot/tab example ? #3 -50,-70,130,10 <BR>
plot/tab example ? #4 -50,-70,190,10 </TT>! plot the last box<TT> <BR>
</TT></BLOCKQUOTE>
<P>
For both the plot and overplot commands one can use the command <TT> SET/GRAPH XFORMAT=none YFORMAT=none</TT><A NAME="7896"> </A>
<A NAME="7897"> </A>to switch off the tick mark labels along
the axes. Of interest, especially for overlays, is another syntax of
the <TT>PLOT/AXES</TT> and <TT>OVERPLOT/AXES</TT> command: it offers the
possibility of drawing axes around (part of) an image displayed in
the display window. <BR>
<P>
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<ADDRESS>
<I>Petra Nass</I>
<BR><I>1999-06-09</I>
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