contourf

I'm trying to create a contour plot from this data: pH D Tur 5.10 3 79.18918919 5.50 6 92.97297297 5.00 0 50.09009009 5.00 6 90.36036036 5.10 9 91.08108108 5.10 12 89.18918919 5.10 15 83.6036036 5.00 18 91.26126126 5.00 21 81.26126126 5.00 24 90.99099099 5.00 27 91.44144144 5.00 30 90.45045045 6.00 0 43.42342342 5.64 3 81.8018018 5.50 9 92.16216216 5.50 0 44.68468468 5.40 12 92.34234234 5.50 15 92.25225225 5.50 18 91.62162162 5.50 21 90.81081081 5.50 24 91.8018018 5.50 27 92.52252252 5.50 30 90.36036036 6.10 3 81.98198198 6.00 6 93.51351351 6.00 9 94.77477477 6.10 12 95.04504505 6.00 15 94

I used Matlab to create a polar coordinate and converted it into Cartesian coordinate. [th,r] = meshgrid((0:0.5:360)*pi/180,0:.02:1); [X,Y] = pol2cart(th,r); I get data on this mesh and produce a contourf plot over it. My problem is that I get a center line in my contourf plot which I would like to remove, could some help me with this Thank you If I extend a little bit your example to get something I can plot, I do reproduce the problem: [th,r] = meshgrid((0:0.5:360)*pi/180,0:.02:1); [X,Y] = pol2cart(th,r); Z = sqrt( X.^2 + Y.^2 ) ; isoLevel = 0:0.1:10 ; [C ,hc] = contourf(X,Y,Z,isoLevel) ;

I'm trying to animate the wigner function of the spatial coordinates of some time-dependent data. The wigner function is 2 dimensional, so I'm using contourf() to plot it. I have the data stored in a HDF5 file and can make Wigner distributions on the fly, but I can't figure out how to animate it. All of the animation tutorials and examples I've been able to find (for example this one and this one ) are strictly for line plots. Specifically, their animate(i) function uses line.set_data() , and I can't seem to find an equivalent for contourf() . How can I animate images made with contourf() ?