How to speed up my code (computing jacobian)

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M. Wang
M. Wang 2024-6-15
评论： Torsten 2024-6-15
My input are a lot of linear expressions such as x1+x2, x2+3*x3 etc. How to speed up my code as follows
allvars = symvar(input); % There are about 1000 LINEAR expressions in 'input'
J = jacobian(input, allvars);
  1 个评论
Torsten
Torsten 2024-6-15
You shouldn't work symbolically with about 1000 expressions. A numerical approach is the way to go.

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采纳的回答

Matt J
Matt J 2024-6-15
编辑：Matt J 2024-6-15
You can use equationsToMatrix to obtain the Jacobian. Depending on what you are doing, you might then convert the matrix to double so you can reuse and do more rapid numerical manipulations with it.

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