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I have a 3D array of data (2 spatial dimensions and 1 time dimension) and I'm trying to produce an animated contour plot using matplotlib.animate. I'm using this link as a basis: http://jakevdp.github.io/blog/2012/08/18/matplotlib-animation-tutorial/ And here's my attempt: import numpy as np from matplotlib import pyplot as plt from matplotlib import animation from numpy import array, zeros, linspace, meshgrid from boutdata import collect # First collect data from files n = collect("n") # This is a routine to collect data Nx = n.shape[1] Nz = n.shape[2] Ny = n.shape[3] Nt = n.shape[0] fig = plt.figure() ax = plt.axes(xlim=(0, 200), ylim=(0, 100)) cont, = ax.contourf([], [], [], 500) # initialisation function def init(): cont.set_data([],[],[]) return cont, # animation function def animate(i): x = linspace(0, 200, Nx) y = linspace(0, 100, Ny) x,y = meshgrid(x,y) z = n[i,:,0,:].T cont.set_data(x,y,z) return cont, anim = animation.FuncAnimation(fig, animate, init_func=init, frames=200, interval=20, blit=True) plt.show() But when I do this, I get the following error: Traceback (most recent call last): File "showdata.py", line 16, in <module> cont, = ax.contourf([], [], [], 500) File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 7387, in contourf return mcontour.QuadContourSet(self, *args, **kwargs) File "/usr/lib/pymodules/python2.7/matplotlib/contour.py", line 1112, in __init__ ContourSet.__init__(self, ax, *args, **kwargs) File "/usr/lib/pymodules/python2.7/matplotlib/contour.py", line 703, in __init__ self._process_args(*args, **kwargs) File "/usr/lib/pymodules/python2.7/matplotlib/contour.py", line 1125, in _process_args x, y, z = self._contour_args(args, kwargs) File "/usr/

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