polar gnuplot demo

#
# $Id: polar.dem%v 3.38.2.88 1993/03/04 01:47:16 woo Exp woo $
#
# Show some of the new polar capabilities.
#
set noborder
set clip
set polar
set dummy x
set samples 160
set xrange [0:2*pi]
set title "Three circles (with aspect ratio distortion)"
plot .5,1,1.5

set title ""

plot cos(2*x)

plot 2*sqrt(cos(x)),-2*sqrt(cos(x))

set offset pi/4,pi/4,0,0
plot sin(4*x),cos(4*x)
set offset 0,0,0,0

set yrange [-5:5]
plot x/cos(3*x)

set autoscale

plot 1-sin(x)

set xrange [0:12*pi]
plot 2*x

butterfly(x)=exp(cos(x))-2*cos(4*x)+sin(x/12)**5
set samples 800
pause 0 "This is a big one (many samples), be patient..."
set title "Butterfly"
set nokey
plot butterfly(x)

# undo what we've done above
set nopolar
set samples 160
set autoscale xy
set title ""
set offset 0,0,0,0
set key
set border