I have some two sets of data with their x- and y-coordinates, (x1, y1) and (x2, y2). I want to plot these curves as a parametric plot:

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from numpy import *

from pylab import *

t = arange ( 0.0 , pi/2 , 0.05)

x1= cos(t)

y1 = -sin(t)

x2 = -1+2/pi*t

y2 = -2/pi*t

# plotted as a normal plot

plot( t , x1 , t , y1 ,t , x2, t , y2)

legend(('x1','y1','x2','y2'))

show()

#########

I have read that this is done with the countour function, but I cannot figure out how. Can somebody help me.

Also I have tried to search for information in this forum using the search tool at the top of the page, but I could not get any hit even for obvious queries such as "output". Is there something wrong?

Thank you in advance

Aitor