On Tue, Dec 11, 2012 at 8:25 AM, Degang Wu <samuelan...@gmail.com> wrote:
> Hi,
>
> My OS is Mac OS X Lion, and the version of matplotlib is 1.2.0 from
> macport.
>
> Now I have an 2d array
>
> a=array([[ 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ],
> [ 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ],
> [ 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ],
> [ 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ],
> [ 0. , 0. , 0. , 0. ,
> 0. , 6.40312424, 19.02629759, 9.8488578 ,
> 12.16552506, 14. , 0. , 37.01351105],
> [ 0. , 0. , 0. , 0. ,
> 6.40312424, 4.24264069, 1.41421356, 8.54400375,
> 4.47213595, 31.25699922, 0. , 25.70992026],
> [ 0. , 0. , 0. , 0. ,
> 19.02629759, 1.41421356, 17.2626765 , 31.32091953,
> 24.18677324, 43.829214 , 0. , 55.14526272],
> [ 0. , 0. , 0. , 0. ,
> 9.8488578 , 8.54400375, 31.32091953, 35.51056181,
> 40.81666326, 57.27128425, 0. , 84.62860037],
> [ 0. , 0. , 0. , 0. ,
> 12.16552506, 4.47213595, 24.18677324, 40.81666326,
> 43.65775991, 74.24957912, 0. , 112.0044642 ],
> [ 0. , 0. , 0. , 0. ,
> 14. , 31.25699922, 43.829214 , 57.27128425,
> 74.24957912, 0. , 0. , 0. ],
> [ 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ,
> 0. , 0. , 0. , 0. ],
> [ 0. , 0. , 0. , 0. ,
> 37.01351105, 25.70992026, 55.14526272, 84.62860037,
> 112.0044642 , 0. , 0. , 0. ]])
>
> first I plot it (in ipython notebook) using:
>
> coord_max=12
> fig = plt.figure()
> ax = fig.gca(projection='3d')
> x,y=np.meshgrid(np.arange(coord_max),np.arange(coord_max))
> ax.plot_wireframe(x,y,a)
>
> and the plot looks fine.
>
> but if I use plot_surface instead, the plot looks very wrong: the plot is
> zero everywhere except on the boundaries.
>
This is because the default rstride and cstride arguments is 10, IIRC.
Since your array is only 12x12, the surface plotting is barely plotting
anything. Try calling:
ax.plot_surface(x, y, a, rstride=1, cstride=1)
I hope that helps!
Ben Root
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