Run script using a group of values?

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TOK 2021-8-30

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评论： TOK 2021-9-3

Hi,

I am trying to do a sort of brute-force optimisation method on my script. I have 3 parameters, and I want to use 3 values for each of those 3 parameters.

I want to script to run with all possible values, giving a total of 27 results.

What is the best way of doing this? Should I just use 3 nested "for" loops?

Thanks

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Answer 1

Matt J 2021-8-30

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编辑：Matt J 2021-8-30

在 MATLAB Online 中打开

You can generate a matrix with all combinations using ndgrid, e.g.,

[p1,p2,p3]=ndgrid(1:3,10:10:30,100:100:300 );
Combinations = [p1(:),p2(:),p3(:)]
Combinations = 27×3
  10   100
  10   100
  10   100
  20   100
  20   100
  20   100
  30   100
  30   100
  30   100
  10   200

Should I just use 3 nested "for" loops?

You could, or you could use a single loop over the rows of Combinations. Ideally, though, you would look for some vectorized way to process the entire Combinations matrix.

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Matt J 2021-8-30

Yes, you could do that.

TOK 2021-9-3

Thanks for your help with this Matt! In the end I just used nested for loops in my case, as it gave me the flexibility to specify a different number of values for each of my 3 parameters.

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