Re: Matrix Differentiation

*To*: mathgroup at smc.vnet.net*Subject*: [mg85907] Re: Matrix Differentiation*From*: sikokaj at iit.edu*Date*: Wed, 27 Feb 2008 04:29:18 -0500 (EST)*References*: <fq0uav$kab$1@smc.vnet.net>

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