\chapter{Special Plot Text Capabilities} \label{appx:plt}

There are several special capabilities available for user-defined text
that appears on a plot (such as the plot caption). For example, the text
can include subscripted text, Greek letters, and special symbols. The
user requests a capability by inserting an ``escape sequence'' in the
text. The escape sequence starts with a backslash (``\verb|\|'') and
(unless otherwise noted) must end with a space which is
deleted from the text string. Escape sequences are translated only when
{\bf software} characters are plotted. If an invalid escape sequence is
entered, an error message appears when the plot is drawn and the
sequence is ignored.
The following escape sequences are available:

\begin{center} \begin{tabbing}
\verb|\|\cmd{XXXXXXX} \= explanation of symbol xx \=
\verb|\|\cmd{XXXXXXX} \= explanation of symbol xx \kill
%
\verb|\|\cmd{SQ} \> square \>
\verb|\|\cmd{CSQ} \> centered square \\
\verb|\|\cmd{DI} \> diamond \>
\verb|\|\cmd{CDI} \> centered diamond \\
\verb|\|\cmd{CS} \> cross \>
\verb|\|\cmd{CCS} \> centered cross \\
\verb|\|\cmd{X} \> X \>
\verb|\|\cmd{CX} \> centered X \\
\verb|\|\cmd{TR} \> triangle \>
\verb|\|\cmd{CTR} \> centered triangle \\
\verb|\|\cmd{CI} \> circle \>
\verb|\|\cmd{CCI} \> centered circle \\
\verb|\|\cmd{DO} \> dot \>
\verb|\|\cmd{CDO} \> centered dot \\
\verb|\|\cmd{LO} \> logo \>
\verb|\|\cmd{CLO} \> centered logo \\
\\
\verb|\|\cmd{SLINE} \> solid line \>
\verb|\|\cmd{DLINE} \> dotted line \\
\verb|\|\cmd{DDLINE} \> dot-dash line \>
\verb|\|\cmd{SDLINE} \> short dash line \\
\verb|\|\cmd{LDLINE} \> long dash line \>
\verb|\|\cmd{MDLINE} \> medium dash line \\
\\
\verb|\|\cmd{NEQ} \> not equal to \\
\verb|\|\cmd{LEQ} \> less than or equal to \>
\verb|\|\cmd{GEQ} \> greater than or equal to \\
\verb|\|\cmd{NLEQ} \> not less than or equal to \>
\verb|\|\cmd{NGEQ} \> not greater than or equal to \\
\verb|\|\cmd{NLT} \> not less than \>
\verb|\|\cmd{NGT} \> not greater than \\
\verb|\|\cmd{LL} \> much less than \>
\verb|\|\cmd{GG} \> much greater than \\
\\
\verb|\|\cmd{PLUSMIN} \> plus or minus \>
\verb|\|\cmd{PRIME} \> prime \\
\verb|\|\cmd{SUM} \> summation \>
\verb|\|\cmd{APPROX} \> approximation sign \\
\verb|\\| \> single backslash (with no ending space) \\
\\
\verb|\|\cmd{GR} \> Greek font \>
\verb|\|\cmd{ENG} \> normal font \\
\\
\verb|\^| \> start superscript (with no ending space) \\
\verb|\_| \> start subscript (with no ending space) \\
\verb|\-| \> end superscript or subscript (with no ending space) \\
\end{tabbing} \end{center}
%\\
%\verb|\|\cmd{CR} \> carriage return \>
%\verb|\|\cmd{LF} \> linefeed \\
%\verb|\|\cmd{CL} \> carriage return and linefeed \\