GNUPlot Manual
GNUPlot Manual
GNUPlot Manual
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28 PLOT gnuplot 4.0 47<br />
This is the same, but uses t as the dummy-variable:<br />
plot [t = -10 :30]<br />
This sets both the x and y ranges:<br />
sin(pi*t)/(pi*t)<br />
plot [-pi:pi] [-3:3] tan(x), 1/x<br />
This sets only the y range, and turns off autoscaling on both axes:<br />
plot [ ] [-2:sin(5)*-8] sin(x)**besj0(x)<br />
This sets xmax and ymin only:<br />
plot [:200] [-pi:]<br />
exp(sin(x))<br />
This sets the x range for a timeseries:<br />
See also<br />
set timefmt "%d/%m/%y %H:%M"<br />
plot ["1/6/93 12:00":"5/6/93 12:00"] ’timedata.dat’<br />
ranges demo.<br />
28.6 Title<br />
A line title for each function and data set appears in the key, accompanied by a sample of the line and/or<br />
symbol used to represent it. It can be changed by using the title option.<br />
Syntax:<br />
title "" | notitle<br />
where is the new title of the line and must be enclosed in quotes. The quotes will not be shown<br />
in the key. A special character may be given as a backslash followed by its octal value ("\345"). The tab<br />
character "\t" is understood. Note that backslash processing occurs only for strings enclosed in double<br />
quotes — use single quotes to prevent such processing. The newline character "\n" is not processed in<br />
key entries in either type of string.<br />
The line title and sample can be omitted from the key by using the keyword notitle. A null title (title<br />
’ ’) is equivalent to notitle. If only the sample is wanted, use one or more blanks (title ’ ’).<br />
If key autotitles is set (which is the default) and neither title nor notitle are specified the line title is<br />
the function name or the file name as it appears on the plot command. If it is a file name, any datafile<br />
modifiers specified will be included in the default title.<br />
The layout of the key itself (position, title justification, etc.) can be controlled by set key. Please see<br />
set key (p. 71) for details.<br />
Examples:<br />
This plots y=x with the title ’x’:<br />
plot x<br />
This plots x squared with title "x^2" and file "data.1" with title "measured data":<br />
plot x**2 title "x^2", ’data.1’ t "measured data"<br />
This puts an untitled circular border around a polar graph:<br />
set polar; plot my_function(t), 1 notitle<br />
28.7 With<br />
Functions and data may be displayed in one of a large number of styles. The with keyword provides<br />
the means of selection.<br />
Syntax: