Re: Matrix Differentiation
- To: mathgroup at smc.vnet.net
- Subject: [mg85917] Re: Matrix Differentiation
- From: dh <dh at metrohm.ch>
- Date: Wed, 27 Feb 2008 04:34:28 -0500 (EST)
- References: <fq0uav$kab$1@smc.vnet.net>
Hi Mark,
you got what you asked for. The syntax you used gives the gradient, see
the manual. What you want is written as:
D[M,x1,x2,x3,x4]
hope this helps, Daniel
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
>