gnuplot documentation

186 gnuplot 4.3 77 TERMINAL
Fonts listed by fontfile or fontfile add encapsulate the font definitions of the listed font from a postscript
Type 1 or TrueType font file directly into the gnuplot output postscript file. Thus, the enclosed font
can be used in labels, titles, etc. See the section postscript fontfile (p. 187) for more details. With
fontfile delete, a fontfile is deleted from the list of embedded files. nofontfiles cleans the list of
embedded fonts.
Examples:
set terminal postscript default # old postscript
set terminal postscript enhanced # old enhpost
set terminal postscript landscape 22 # old psbig
set terminal postscript eps 14 # old epsf1
set terminal postscript eps 22 # old epsf2
set size 0.7,1.4; set term post portrait color "Times-Roman" 14
set term post "VAGRoundedBT_Regular" 14 fontfile "bvrr8a.pfa"
Linewidths and pointsizes may be changed with set style line.
The postscript driver supports about 70 distinct pointtypes, selectable through the pointtype option
on plot and set style line.
Several possibly useful files about gnuplot’s PostScript are included in the /docs/psdoc subdirectory of
the gnuplot distribution and at the distribution sites. These are "ps symbols.gpi" (a gnuplot command
file that, when executed, creates the file "ps symbols.ps" which shows all the symbols available through
the postscript terminal), "ps guide.ps" (a PostScript file that contains a summary of the enhanced
syntax and a page showing what the octal codes produce with text and symbol fonts), "ps file.doc" (a
text file that contains a discussion of the organization of a PostScript file written by gnuplot), and
"ps fontfile doc.tex" (a LaTeX file which contains a short documentation concerning the encapsulation
of LaTeX fonts with a glyph table of the math fonts).
A PostScript file is editable, so once gnuplot has created one, you are free to modify it to your heart’s
desire. See the editing postscript (p. 187) section for some hints.
77.53.1 Enhanced postscript
Several terminal types support an enhanced text mode in which additional formatting information is
embedded in the text string.
Enhanced Text Control Codes
Control Examples Explanation
^ a^x superscript
_ a_x subscript
@ @x or a@^b_c phantom box (occupies no width)
& &{space} inserts space of specified length
~ ~a{.8-} overprints ’-’ on ’a’, raised by .8
times the current fontsize
Braces can be used to place multiple-character text where a single character is expected (e.g., 2^{10}).
To change the font and/or size, use the full form: {/[fontname][=fontsize | *fontscale] text}. Thus
{/Symbol=20 G} is a 20-point GAMMA and {/*0.75 K} is a K at three-quarters of whatever fontsize
is currently in effect. (The ’/’ character MUST be the first character after the ’{’.)
If the encoding vector has been changed by set encoding, the default encoding vector can be used
instead by following the slash with a dash. This is unnecessary if you use the Symbol font, however —
since /Symbol uses its own encoding vector, gnuplot will not apply any other encoding vector to it.
The phantom box is useful for a@^b c to align superscripts and subscripts but does not work well for
overwriting an accent on a letter. (To do the latter, it is much better to use ’set encoding iso 8859 1’
to change to the ISO Latin-1 encoding vector, which contains a large variety of letters with accents or
other diacritical marks.) Since the box is non-spacing, it is sensible to put the shorter of the subscript
or superscript in the box (that is, after the @).
Space equal in length to a string can be inserted using the ’&’ character. Thus