From: <projetmbc@cl...>  20090129 08:53:38

>On Jan 28, 2009, at 8:26 AM, projetmbc@... wrote: > >> I'm looking a solution for ploting relation like f(x;y)=0. > >I usually just contour the function over the region. E.g., > > >>> import numpy as np > >>> import matplotlib.pyplot as plt > >>> x, y = mgrid[10:10:50j, 10:10:50j] > >>> f = x**3 * y  3.0 > >>> contour(x, y, f, (0,)) > >The fourth argument to contour is a list of contours to plot, here >only zero. > >Rob Thanks, this works well with the following minor changes. import numpy as np import matplotlib.pyplot as plt x, y = np.mgrid[10:10:50j, 10:10:50j] f = x*np.sin(y) + y * np.sin(x) 4.0 plt.contour(x, y, f, (0,)) plt.show() 