Extracting the maximum value from each array of different dimensions in a cell?
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I have a cell (X) with arrays of different dimensions. I want to create a new array containing only the maximum values of each array of the cell. I tried Y=[X{:}]; but it didn't work due to different dimensions of the arrays. Can anyone please help me to exract the maximum value from each array in the cell and create a new variable out of the extracted values.
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Accepted Answer
Voss
on 23 Sep 2021
X_max = cellfun(@(y)max(y(:)),X);
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Voss
on 27 Sep 2021
Since each element of X is itself a cell array, you have to use cellfun twice. Try something like this:
X_max = cellfun(@(x)max(x(:)),cellfun(@(x)[x{:}],X,'UniformOutput',false),'UniformOutput',false);
Then X_max is a cell array containing the maximum value of each set of arrays forming an element of X, with empty entries where X{i} is a cell array with all empty vectors.
If you want X_max to contain some scalar value, say NaN, where X{i} is a cell array of all empty vectors, you can do something like this next:
X_max(cellfun(@(x)isempty(x),X_max)) = {NaN};
Then you can make X_max a numeric array if you want:
X_max = [X_max{:}];
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