matplotlib - Surface plot from three 1d arrays with different size -


i want plot following quadratic form:

f(x) = 1/2 x^t * * x -b^t *x

where 2x2 matrix. x1-axis: [-6,4] x2-axis: [-4,6]

i did following:

x = arange(-6,4,0.1) y = arange(-4,6,0.1)

so both x , y conatain 100 points. want evaluate quadratic form @ pairs of points, i.e. 100*100 = 10000 points.

done following code:

res= [] in x:     b in y:         val = f(array([a,b]))         res.append(val)

now want make kind of surface plot. can me figure out how this? tried:

fig = plt.figure() ax = fig.add_subplot(111, projection='3d') surf = ax.plot_surface(x, y, res)

i think following method should not know how exactly:

griddata- interpolates nonuniformly spaced grid other grid.

any ideas?


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