import biggles
import numpy
import numpy.random
p = biggles.FramedPlot()
p.xrange = 0, 100
p.yrange = 0, 100
p.aspect_ratio = 1
x = numpy.arange( 0, 100, 5 )
yA = numpy.random.normal( 40, 10, (len(x),) )
yB = x + numpy.random.normal( 0, 5, (len(x),) )
a = biggles.Points( x, yA, type="circle" )
a.label = "a points"
b = biggles.Points( x, yB )
b.label = "b points"
b.style( type="filled circle" )
l = biggles.Slope( 1, type="dotted" )
l.label = "slope"
k = biggles.PlotKey( .1, .9, [a,b,l] )
p.add( l, a, b, k )
p.write_img( 400, 400, "example2.png" )
p.write_eps( "example2.eps" )
p.show()
