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Re: Matrix Differentiation


This seems to work for me. I defined a simple test matrix:

M = Table[x^i y^j z^(i + j) v^(i - j), {i, 1, 4}, {j, 1, 4}]

and then did

 D[#, x, y, z, v] & /@ M

Kajetan Sikorski

mark wrote:
> Hi all,
>
> I need to differentiate a 4x4 matrix M with respect to four variables
> x1,x2,x3 and x4.
>
> I have tried to use the function D as follows:
>
> D[M,{{x1,x2,x3,x4}}]
>
> what I get is a 4x4 matrix and each term in this matrix is a vector.
>
> Am I right when I used this function or there is another function to
> do so?
>
> Thanks


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