GNUPlot Manual

90 gnuplot 4.0 36 SET-SHOW
The command unset polar changes the meaning of the plot back to the default rectangular coordinate
system.
The set polar command is not supported for splots. See the set mapping (p. 76) command for
similar functionality for splot (p. 154)s.
While in polar coordinates the meaning of an expression in t is really r = f(t), where t is an angle of
rotation. The trange controls the domain (the angle) of the function, and the x and y ranges control
the range of the graph in the x and y directions. Each of these ranges, as well as the rrange, may be
autoscaled or set explicitly. See set xrange (p. 148) for details of all the ranges (p. 46) commands.
Example:
set polar
plot t*sin(t)
plot [-2*pi:2*pi] [-3:3] [-3:3] t*sin(t)
The first plot uses the default polar angular domain of 0 to 2*pi. The radius and the size of the graph
are scaled automatically. The second plot expands the domain, and restricts the size of the graph to
[-3:3] in both directions.
You may want to set size square to have gnuplot try to make the aspect ratio equal to unity, so that
circles look circular. See also
and
polar demos (polar.dem)
polar data plot (poldat.dem).
36.52 Print
The set print command redirects the output of the print command to a file.
Syntax:
set print
set print "-"
set print ""
set print "" append
set print "|"
Without "", the output file is restored to . The "-" means
. The append flag causes the file to be opened in append mode. A starting
with "|" is opened as a pipe to the on platforms that support piping.
36.53 Rmargin
The command set rmargin sets the size of the right margin. Please see set margin (p. 77) for details.
36.54 Rrange
The set rrange command sets the range of the radial coordinate for a graph in polar mode. Please see
set xrange (p. 148) for details.
36.55 Samples
The sampling rate of functions, or for interpolating data, may be changed by the set samples command.
Syntax:
set samples {,}
show samples