partial differentating a matrix by a vector
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Hi guys,
I want to comute 
,
,where M is a 
symbolic matrix , and A is a 
symbolic vector. Are there any commands in Matlab can make it?
symbolic matrix , and A is a symbolic vector. Are there any commands in Matlab can make it?Many thanks!
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Bjorn Gustavsson
2019-10-30
0 个投票
Have a look at the help and documentation for jacobian.
HTH
4 个评论
Tony Cheng
2019-11-4
Bjorn Gustavsson
2019-11-4
编辑：Bjorn Gustavsson
2019-11-4
My bad, but: Same difference. What you ask for would then be something like the combined Jacobians for each row of your input matrix, how, you'd go about storing those differentials is for you to chose, and will depend on what you need to do with them. Sometimes I prefer using 3-D arrays. Sometimes it is beneficial to use 1 and 2-D arrays for neat matrix-multiplications, then it is easy to convert matrices to column-vectors using:
V = M(:);
Then you've straightened out your matrix to a vector where you can directly use jacobian, after that you might want to reshape it to suit your needs.
HTH
Tony Cheng
2019-11-11
Bjorn Gustavsson
2019-11-12
Thanks, I'm happy to have contributed.
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