Example of how to create and save a polar plot gnuplot> set polar gnuplot> set samples 5000 gnuplot> l=2 gnuplot> p=0. gnuplot> plot cos(l*t+p)**2 gnuplot> p=.25 gnuplot> p=pi/2 gnuplot> replot gnuplot> set terminal postscript color Terminal type set to 'postscript' Options are 'landscape noenhanced color dashed defaultplex "Helvetica" 14' gnuplot> set output "plot.ps" gnuplot> replot gnuplot> exit