GNUPlot Manual

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128 gnuplot 4.0 36 SET-SHOW You can escape control characters using \, e.g., \\, \{, and so on. But be aware that strings in double-quotes are parsed differently than those enclosed in single-quotes. The major difference is that backslashes may need to be doubled when in double-quoted strings. Examples (these are hard to describe in words — try them!): set xlabel ’Time (10^6 {/Symbol m}s)’ set title ’{/Symbol=18 \362@_{/=9.6 0}^{/=12 x}} \ {/Helvetica e^{-{/Symbol m}^2/2} d}{/Symbol m}’ The file "ps guide.ps" in the /docs/psdoc subdirectory of the gnuplot source distribution contains more examples of the enhanced syntax. 36.59.55.2 Editing postscript The PostScript language is a very complex language — far too complex to describe in any detail in this document. Nevertheless there are some things in a PostScript file written by gnuplot that can be changed without risk of introducing fatal errors into the file. For example, the PostScript statement "/Color true def" (written into the file in response to the command set terminal postscript color), may be altered in an obvious way to generate a black-and-white version of a plot. Similarly line colors, text colors, line weights and symbol sizes can also be altered in straightforward ways. Text (titles and labels) can be edited to correct misspellings or to change fonts. Anything can be repositioned, and of course anything can be added or deleted, but modifications such as these may require deeper knowledge of the PostScript language. The organization of a PostScript file written by gnuplot is discussed in the text file "ps file.doc" in the docs/ps subdirectory of the gnuplot source distribution. 36.59.55.3 Postscript fontfile The fontfile or fontfile add option takes one file name as argument and encapsulates this file into the postscript output in order to make this font available for text elements (labels, tic marks, titles, etc.). The fontfile delete option also takes one file name as argument. It deletes this file name from the list of encapsulated files. The postscript terminal understands some font file formats: Type 1 fonts in ASCII file format (extension ".pfa"), Type 1 fonts in binary file format (extension ".pfb"), and TrueType fonts (extension ".ttf"). Pfa files are understood directly, pfb and ttf files are converted on the fly if appropriate conversion tools are installed (see below). You have to specify the full filename with the extension. Each fontfile option takes exact one font file name. This option can be used multiple times in order to include more than one font file. The font file is searched in the working directory and in all directories listed in the fontpath which is determined by set fontpath. In addition, the fontpath can be set using the environment variable GNUPLOT FONTPATH. If this is not set a system dependent default search list is used. See set fontpath (p. 65) for more details. For using the encapsulated font file you have to specify the font name (which normally is not the same as the file name). When embedding a font file by using the fontfile option in interactive mode, the font name is printed on the screen. E.g. Font file ’p052004l.pfb’ contains the font ’URWPalladioL-Bold’. Location: /usr/lib/X11/fonts/URW/p052004l.pfb When using pfa or pfb fonts, you can also find it out by looking into the font file. There is a line similar to "/FontName /URWPalladioL-Bold def". The middle string without the slash is the fontname, here "URWPalladioL-Bold". For TrueType fonts, this is not so easy since the font name is stored in a binary format. In addition, they often have spaces in the font names which is not supported by Type 1 fonts (in which a TrueType is converted on the fly). The font names are changed in order to eliminate the spaces in the fontnames. The easiest way to find out which font name is generated for use with gnuplot, start gnuplot in interactive mode and type in "set terminal postscript fontfile ’’". For converting font files to pfa format the conversion tool has to read the font from a file and write it to standard output. For pfb files "pfbtops" is a tool which can do this. If this program is installed on your system the on the fly conversion should work. Just try to encapsulate a pfb file. If the compiled
36 SET-SHOW gnuplot 4.0 129 in program call does not work correctly you can specify how this program is called by defining the environment variable GNUPLOT PFBTOPFA e.g. to "pfbtops %s". The %s will be repeated by the font file name and thus has to exist in the string. If you don’t want to do the conversion on the fly but get a pfa file of the font you can use the tool "pfb2pfa" which is written in simple c and should compile with any c compiler. It is available from many ftp servers, e.g. ftp://ftp.dante.de/tex-archive/fonts/utilities/ps2mf/ In fact, "pfbtopfa" and "pfb2ps" do the same job. "pfbtopfa" puts the resulting pfa code into a file, whereas "pfbtops" writes it to standard output. TrueType fonts are converted into Type 1 pfa format, e.g. by using the tool "ttf2pt1" which is available from http://ttf2pt1.sourceforge.net/ If the builtin conversion does not work, the conversion command can be changed by the environment variable GNUPLOT TTFTOPFA. For usage with ttf2pt1 it may be set to "ttf2pt1 -a -e -W 0 %s - ". Here again, %s stands for the file name. For special purposes you also can use a pipe (if available for your operating system). Therefore you start the file name definition with the character "
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gnuplot An Interactive Plotting Pro
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CONTENTS gnuplot 4.0 3 12.1 Bind .
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CONTENTS gnuplot 4.0 5 36.9 Clip .
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CONTENTS gnuplot 4.0 7 36.57.6.18 Y
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CONTENTS gnuplot 4.0 9 36.59.62 Svg
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CONTENTS gnuplot 4.0 11 36.114Cbtic
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3 SEEKING-ASSISTANCE gnuplot 4.0 13
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4 WHAT IS NEW IN VERSION 4.0 gnuplo
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6 COMMAND-LINE-EDITING gnuplot 4.0
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10 EXPRESSIONS gnuplot 4.0 19 FIT S
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10 EXPRESSIONS gnuplot 4.0 21 other
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11 GLOSSARY gnuplot 4.0 23 10.3 Use
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13 PLOTTING gnuplot 4.0 25 ctrl, al
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17 TIME/DATE DATA gnuplot 4.0 27 co
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21 EXIT gnuplot 4.0 29 19 Call The
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22 FIT gnuplot 4.0 31 current param
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22 FIT gnuplot 4.0 33 though the st
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22 FIT gnuplot 4.0 35 (branch) for
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26 LOAD gnuplot 4.0 37 if () [; el
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28 PLOT gnuplot 4.0 39 28.1 Data-fi
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28 PLOT gnuplot 4.0 41 28.1.4 Smoot
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28 PLOT gnuplot 4.0 43 pop(x) = 103
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28 PLOT gnuplot 4.0 45 (x, y, ydelt
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28 PLOT gnuplot 4.0 47 This is the
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31 QUIT gnuplot 4.0 49 This plots "
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35 SAVE gnuplot 4.0 51 unset key se
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36 SET-SHOW gnuplot 4.0 53 {linewid
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36 SET-SHOW gnuplot 4.0 55 This dis
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36 SET-SHOW gnuplot 4.0 57 Draw def
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36 SET-SHOW gnuplot 4.0 59 set cntr
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36 SET-SHOW gnuplot 4.0 61 36.12 Co
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36 SET-SHOW gnuplot 4.0 63 36.14.3
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36 SET-SHOW gnuplot 4.0 65 36.18 En
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36 SET-SHOW gnuplot 4.0 67 Tic-mark
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36 SET-SHOW gnuplot 4.0 69 36.24 Gr
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36 SET-SHOW gnuplot 4.0 71 the edge
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36 SET-SHOW gnuplot 4.0 73 Some or
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36 SET-SHOW gnuplot 4.0 75 unset la
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Page 79 and 80: 36 SET-SHOW gnuplot 4.0 79 For some
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Page 85 and 86: 36 SET-SHOW gnuplot 4.0 85 36.49 Pa
Page 87 and 88: 36 SET-SHOW gnuplot 4.0 87 36.49.2
Page 91 and 92: 36 SET-SHOW gnuplot 4.0 91 By defau
Page 93 and 94: 36 SET-SHOW gnuplot 4.0 93 Examples
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Page 97 and 98: 36 SET-SHOW gnuplot 4.0 97 36.57.6.
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Page 117 and 118: 36 SET-SHOW gnuplot 4.0 117 PNG/JPE
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Page 139 and 140: 36 SET-SHOW gnuplot 4.0 139 or [no]
Page 141 and 142: 36 SET-SHOW gnuplot 4.0 141 gnuplot
Page 143 and 144: 36 SET-SHOW gnuplot 4.0 143 36.62 T
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Page 147 and 148: 36 SET-SHOW gnuplot 4.0 147 See als
Page 149 and 150: 36 SET-SHOW gnuplot 4.0 149 In 2-d,
Page 151 and 152: 36 SET-SHOW gnuplot 4.0 151 set xda
Page 153 and 154: 36 SET-SHOW gnuplot 4.0 153 set zer
Page 155 and 156: 38 SPLOT gnuplot 4.0 155 splot {}
Page 157 and 158: 38 SPLOT gnuplot 4.0 157 Note that
Page 159 and 160: 43 OLD BUGS gnuplot 4.0 159 be "old
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