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<H3><A NAME="SECTION001014300000000000000"> </A>
<A NAME="7529"> </A>
<BR>
Plotting text, symbols, and lines
</H3>
For overplotting of text one can use the command <TT>LABEL/GRAPHIC</TT>
<A NAME="7899"> </A>. The text will be plotted in
the font style set with the <TT>FONT</TT> keyword in the <TT>SET/GRAPHIC</TT>
command. <I>E.g.</I> with <TT>LABEL/GRAPHIC</TT> and running in <TT>FONT=1</TT>
text will be generated in the roman font type.
<TT>LABEL/GRAPHIC</TT> make use of the built-in features of AGL. These features
allow to change font, draw subscripts and superscripts, scale the text
size, or draw various symbols, all within the text string.
All these possibility become available by including metacharacters in the
text string. Currently, AGL knows the metacharacter set listed in
Table <A HREF="node93.html#meta-characters">6.3</A>.
<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="7545"> </A>
<TABLE>
<CAPTION><STRONG>Table 6.3:</STRONG>
Meta Character in AGL and MIDAS</CAPTION>
<TR><TD>
<DIV ALIGN="CENTER">
<TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER">
<TR><TH ALIGN="LEFT"><B>Metacharacter </B></TH>
<TH ALIGN="LEFT"><B>Meaning </B></TH>
</TR>
<TR><TD ALIGN="LEFT"><code>\{</code></TD>
<TD ALIGN="LEFT">begin grouping</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\}</code></TD>
<TD ALIGN="LEFT">end grouping</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\^</code></TD>
<TD ALIGN="LEFT">move the following part of the string up by half a
character</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\!u</code></TD>
<TD ALIGN="LEFT">move the following part of the string up by half a
character</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\_</code></TD>
<TD ALIGN="LEFT">move the following part of the string down by half a
character</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\!d</code></TD>
<TD ALIGN="LEFT">move the following part of the string down by half a
character</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\<</code></TD>
<TD ALIGN="LEFT">backspace by a single character</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\+</code></TD>
<TD ALIGN="LEFT">increase character size by 20%</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\-</code></TD>
<TD ALIGN="LEFT">decrease character size by 20%</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\!</code></TD>
<TD ALIGN="LEFT">force interpretation of the following part as a
metasequence</TD>
</TR>
<TR><TD ALIGN="LEFT"> </TD>
<TD ALIGN="LEFT">(this is needed to allow metasequences starting with 'n'</TD>
</TR>
<TR><TD ALIGN="LEFT"> </TD>
<TD ALIGN="LEFT">not to be interpreted as newlines)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\0</code></TD>
<TD ALIGN="LEFT">select font 0 (Default font)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\1</code></TD>
<TD ALIGN="LEFT">select font 1 (Quality roman font)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\2</code></TD>
<TD ALIGN="LEFT">select font 2 (Greek font)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\3</code></TD>
<TD ALIGN="LEFT">select font 3 (Script font)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\4</code></TD>
<TD ALIGN="LEFT">select font 4 (Old English)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\5</code></TD>
<TD ALIGN="LEFT">select font 5 (Tiny roman font)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\[</code></TD>
<TD ALIGN="LEFT">increase line width (bolding; optional)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\]</code></TD>
<TD ALIGN="LEFT">decrease line width (bolding; optional)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\#<n></code></TD>
<TD ALIGN="LEFT">draw marker number <<I>n</I>> into the line</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\n</code></TD>
<TD ALIGN="LEFT">perform a `newline'</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>~~</code></TD>
<TD ALIGN="LEFT">draw a single '<code>~</code>' character (must be following by a
blank)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\~</code></TD>
<TD ALIGN="LEFT">draw a single '<code>\~</code>' character (must be following by a
blank)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>~\</code></TD>
<TD ALIGN="LEFT">draw a single '
<!-- MATH: $\backslash$ -->
<IMG
WIDTH="16" HEIGHT="44" ALIGN="MIDDLE" BORDER="0"
SRC="img249.gif"
ALT="$\backslash$">' character (must be following
by a blank)</TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\\</code></TD>
<TD ALIGN="LEFT">draw a single '
<!-- MATH: $\backslash$ -->
<IMG
WIDTH="17" HEIGHT="44" ALIGN="MIDDLE" BORDER="0"
SRC="img250.gif"
ALT="$\backslash$">' character (must be following
by a blank)</TD>
</TR>
</TABLE></DIV>
<A NAME="meta-characters"> </A> </TD></TR>
</TABLE>
</DIV>
<BR>
<P>
The character `<code>~</code>' can also be used instead of `
<!-- MATH: $\backslash$ -->
<IMG
WIDTH="16" HEIGHT="44" ALIGN="MIDDLE" BORDER="0"
SRC="img251.gif"
ALT="$\backslash$">' as
metacharacter flag. The `<code>~</code>' is more suited to C programs where
'
<!-- MATH: $\backslash$ -->
<IMG
WIDTH="17" HEIGHT="44" ALIGN="MIDDLE" BORDER="0"
SRC="img252.gif"
ALT="$\backslash$">' has a special meaning.
All selections made by metacharacters are valid from the point in the
string where they are defined up either to the end of current group (the
part of the string enclosed in
<!-- MATH: $\backslash$ -->
<IMG
WIDTH="16" HEIGHT="44" ALIGN="MIDDLE" BORDER="0"
SRC="img253.gif"
ALT="$\backslash$">{...
<!-- MATH: $\backslash$ -->
<IMG
WIDTH="17" HEIGHT="44" ALIGN="MIDDLE" BORDER="0"
SRC="img254.gif"
ALT="$\backslash$">}) or to the
end of the string. If the metacharacter sequence is more than one character
long (escape not included, of course), it must be followed by a blank space.
<BR>
<B>Example:</B>
<PRE>
LABEL/GRAP "e\{\!u(x\{\!u2\}+y\{\!u2\})\}= -
(\alpha +\beta ) sin\{\!u2\}\theta "
</PRE> This command will produce the label
<!-- MATH: $e^{(x^2+y^2)}=(\alpha+\beta)\sin^2\theta$ -->
<IMG
WIDTH="233" HEIGHT="54" ALIGN="MIDDLE" BORDER="0"
SRC="img255.gif"
ALT="$e^{(x^2+y^2)}=(\alpha+\beta)\sin^2\theta$">
at a position which the user
should give via cursor input.
<P>
MIDAS/AGL also interprets a set of `T<SMALL>E</SMALL>X-like' keywords as listed in
table <A HREF="node93.html#tex-characters">6.4</A>. Due to the fact that most of them represent
special characters and symbols to be printed, only the names are listed;
the symbols can only be seen by <TT>LABEL/GRAPHIC</TT> or the command
<TT>TUTORIAL/GRAPH</TT>.
<P>
Besides overplotting of text strings, the user can also overplot lines
(up to six different line types, depending on the device), and symbols
(more than twenty). Depending on the device, up to four different line
widths can be used. The selection of line properties and of symbol type
can be done with <TT>SET/GRAPH</TT>, or, at least for line and symbol type,
on the command line.
<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="7562"> </A>
<TABLE>
<CAPTION><STRONG>Table:</STRONG>
T<SMALL>E</SMALL>X-like Characters for text strings in MIDAS Graphics</CAPTION>
<TR><TD>
<DIV ALIGN="CENTER">
<TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER">
<TR><TD ALIGN="LEFT"><code>\AA \Alpha \Aquarius \Aries</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Beta \Cancer \Capricorn \Chi</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Delta \Earth \Epsilon \Eta</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Gamma \Gemini \Iota \Jupiter</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Kappa \Lambda \Leo \Libra</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Mars \Mercury \Moon \Mu</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Neptune \Nu \Omega \Omicron</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\PI \Phi \Pisces \Pluto</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Psi \Rho \Sagittarius \Saturn</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Scorpio \Sigma \Sqrt \Tau</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Taurus \Theta \Upsilon \Uranus</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\Venus \Virgo \Xi \Zeta</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\aleph \alpha \asteroid \beta</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\bigcirc \black \blue \cent</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\chi \circ \cyan \clover</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\clubsuit \comet \dag \ddag</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\default \delta \diamond \div</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\downarro \epsilon \equinox \equiv</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\eta \firtree \gamma \ge</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\greek \green \hbar \heart</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\infty \int \iota \italic</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\kappa \lambda \larrow \le</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\magenta \mp \mu \!nabla</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\!ne \!nu \odot \oint</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\old \omega \omicron \oplus</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\otimes \palmtree \paragraph \parallel</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\partial \perp \phi \pi</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\pm \propto \psi \red</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\rho \rightarrow \roman \script</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\shield \sigma \snow \spade</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\sqrt \sum \tau \theta</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\times \tiny \uparrow \upsilon</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\varepsilon \varphi \vartheta \white</code></TD>
</TR>
<TR><TD ALIGN="LEFT"><code>\xi \yellow \zeta</code></TD>
</TR>
</TABLE></DIV>
<A NAME="tex-characters"> </A> </TD></TR>
</TABLE>
</DIV>
<BR>
<P>
The command <TT>OVERPLOT/LINE</TT><A NAME="7902"> </A>
offers the possibility to overplot a line. Similarly,
<TT>OVERPLOT/SYMBOL</TT><A NAME="7903"> </A> overplots
symbols. Both commands can be used interactively using the graphics cursor,
or by giving the coordinates on the command line. Grid lines, connecting
the major and/or minor tick marks can be drawn with the command
<TT>OVERPLOT/GRID</TT><A NAME="7904"> </A>.
<P>
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