Differentiation of matrices using diff

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Vithusha T
Vithusha T 2021-3-21
回答： Star Strider 2021-3-21
I need to differentiate alpha w.r.t time (da/dt) where alpha is a 19*1 matrix and time is 19*6 matrix and i tried using diff(a,t) but getting an error that difference order must be a positive scalar integer. When using diff(a)/diff(t), i'm getting a 18*6 matrix but i need a 19*6 matrix as answer.

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Star Strider
Star Strider 2021-3-21
Experiment with the gradient function. It may do what you want, although to take the gradient (in this context, numeric spatial derivative) of a matrix, it will be necessary to request the correct result from the two outputs it will provide.

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