splitapply with multiple output variables
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Hi,
I would like to use splitapply in combination with the function mink on a column of a cell array. My code below gives me the correct number of minimum values for each of my groups, however, it does not give the indices for these values.
This is my code:
quantGroups = findgroups([locAwayFromMean{:,12}]); % grouping info as vector
funcMink = @(x) {mink(x,10)}; % anonymous fct to get 10 lowest values of x
valMink = splitapply(funcMink,cell2mat(locAwayFromMean(:,11)),quantGroups'); % apply fct to each group
I have a 258x12 cell (locAwayFromMean) where column 12 gives information about grouping. I want to get 10 minimum values (stored in column 11) for each group and also the indices of these data points.
The mink function [B,I] = mink(___) does allow to extract the indices but I am not sure how to implement this into my code above.
If I use this line
[valMink, Idx] = splitapply(funcMink,cell2mat(locAwayFromMean(:,11)),quantGroups');
it produces the following error message:
Error using splitapply
Applying the function '@(x){mink(x,10)}' to the 1st group of data generated the following error:
Insufficient number of outputs from right hand side of equal sign to satisfy assignment.
Thanks in advance!
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Accepted Answer
Matt J
on 23 Feb 2023
Edited: Matt J
on 23 Feb 2023
quantGroups = findgroups([locAwayFromMean{:,12}]); % grouping info as vector
X=cell2mat(locAwayFromMean(:,11));
I=1:numel(X);
[valMink,indexMink] = splitapply(@funcMink, X(:), I(:), quantGroups(:)); % apply fct to each group
function [minval,minIndex]=funcMink(X,I)
[minval{1},j]=mink(X,10);
minIndex={I(j)};
end
6 Comments
Matt J
on 23 Feb 2023
Well, you can't run it line by line, because one of those lines calls a function (funcMink) that Matlab needs to be able to find. You have to make the function visible to Matlab first.
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