What do I have to do if I want to derivative and continue multiplying?

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chayanon summueang
chayanon summueang 2022-5-17
回答： KSSV 2022-5-17
If I have two matrices
A = [1 2;3 4;5 6];
B = [7 8;9 10;11 12];
but my final equation is
D = transpose(A)*diff(B);
resulting in diff(B) has a dimension 2x2 but transpose(A) has a dimension 2x3
What's the best way to multiply them? (do not use .*)
Or should I use a gradient to maintain the dimensions of diff(A)?
Thank you for your helpful answers!!

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回答（1 个）

KSSV
KSSV 2022-5-17
Ran in:
A = [1 2;3 4;5 6];
B = [7 8;9 10;11 12];
D = A'*gradient(B)
D = 2×2
9 9 12 12

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