how do I merge multiple matrices into one?
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I have 50 1111 x 3 size matrics. I want to combine them into one final matrix such as all first rows from individual matrices are in first 50 rows and then all 2nd rows and so on. Also, for each set of rows it should insert a header row at the beginning.
How do I do this in Matlab?
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Walter Roberson
le 25 Fév 2021
Is this for writing into an xlsx file? SInce you cannot create a numeric array that has header rows in the middle of it, and if you were to create a table() object all of the entries would have to be cells in order to permit the header rows to be in middle of it.
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Walter Roberson
le 2 Mar 2021
One approach
N = 4; %50 in your original
Rows = 2; %1111 in your original
%generate some data for illustration
M = arrayfun(@(ignore) randi(9,Rows,3), (1:N).', 'uniform', 0)
cell2mat(M) %for illustration
nrow = size(M{1},1);
headers = repmat(-(1:nrow).', 1, 3);
grouped = arrayfun(@(row) cell2mat(cellfun(@(C) C(row,:), M, 'uniform', 0)), 1:nrow, 'uniform', 0)
headered = [num2cell(headers,2).'; grouped]
joint = cell2mat(headered(:))
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