[Matplotlib-users] griddata fails

[Shahar Shani-K. <ka...@po...>]

Hi,

I'm trying to contour some data that I have and the griddata line fails. I tried running it on some synthetically generated data and I get the same IndexError. Any Ideas?

Here is the example with the synthetic data:

x = y = arange(-10,10,0.01)

z = x**2+y**3

xi = yi = linspace(-10.1, 10.1, 100)

zi = griddata(x, y, z, xi, yi)
---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-52-0458ab6ea672> in <module>()
----> 1 zi = griddata(x, y, z, xi, yi)

/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/mlab.py in griddata(x, y, z, xi, yi, interp)
   2766             xi,yi = np.meshgrid(xi,yi)
   2767         # triangulate data
-> 2768         tri = delaunay.Triangulation(x,y)
   2769         # interpolate data
   2770         if interp == 'nn':

/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/delaunay/triangulate.py in __init__(self, x, y)
     88             self.triangle_neighbors = delaunay(self.x, self.y)
     89 
---> 90         self.hull = self._compute_convex_hull()
     91 
     92     def _collapse_duplicate_points(self):

/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/delaunay/triangulate.py in _compute_convex_hull(self)
    113 
    114         edges = {}
--> 115         edges.update(dict(zip(self.triangle_nodes[border[:,0]][:,1],
    116                               self.triangle_nodes[border[:,0]][:,2])))
    117         edges.update(dict(zip(self.triangle_nodes[border[:,1]][:,2],

IndexError: invalid index