How to create a vector by indexing elements within each cell of a 1xN cell array

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Daniel Rowe 2021-5-14

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评论： Daniel Rowe 2021-5-17

I have a 1xN cell array (raw_array) and I am trying to create a vector of N values using the same indexing (a,b) within each cell.

I can use this expression to extract a scalar value from a single cell:

raw_array{1,n(x,y)}(a,b)

Here n(x,y) is just a means of indexing the correct cell within the cell array.

Let's say y varies from 1-10, i earlier tried the following:

raw_array{1,n(x,1:10)}(a,b) but clearly this doesn't work (error msg: Expected one output from a curly brace or dot indexing expression, but there were 10 results).

I really want to avoid writing each vector element separately, e.g. [raw_array{1,n(x,1)}(a,b) raw_array{1,n(x,2)}(a,b)...]

Can anybody please give me a hint or suggestion?

Thanks

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Stephen23 2021-5-14

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编辑：Stephen23 2021-5-14

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Where C is your cell array:

a = ..;
b = ..;
F = @(m)m(a,b);
V = cellfun(F,C)

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Stephen23 2021-5-17

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Sorry, the code I posted earlier was not correct. Please show the output of this:

for k = 1:numel(raw_array)
   size(raw_array{k})
end

Daniel Rowe 2021-5-17

No problem, I have reworked the code now so that it makes more sense. Thanks!

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MATLAB Language Fundamentals Matrices and Arrays Matrix Indexing

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