Homework Help: Taking derivative of a transposed matrix

1. Apr 11, 2012

MaxManus

I have a matrix (z-m1) ^T where z is a matrix and 1 i a column where all the elements are 1. Can anyone help me with taking the derivative with respect to m?

T is for transpose.

2. Apr 11, 2012

Staff: Mentor

z-m1 doesn't make sense to me. I'm assuming that z is an n x n matrix and 1 is an n x 1 matrix (column vector), so the subtraction is undefined.

3. Apr 11, 2012

MaxManus

Thanks, I assumed z to be an n x n matrix as well but since that doesnt make any sence it must be a n*1 matrix and then I can just use ordinary derivation and I get

(z-1)^T

4. Apr 11, 2012

Staff: Mentor

I think it would be -1T, where 1 is as you defined it.

5. Apr 12, 2012

MaxManus

Yes of course, thanks