Concatenate matrices from cell array
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Jasper
am 11 Nov. 2014
Verschoben: Dyuman Joshi
am 31 Jan. 2024
Hello,
I have a cell array with different length matrices in each cell, i.e. the number of columns is always the same, but the number of rows differs. I want to combine all those matrices together in 1 big matrix, and have difficulties doing so. I know it's best to pre-allocate the final matrix before filling it, so thats what I do, but I can't get the actual filling to work.
For example:
A = rand(5,2);
B = rand(7,2);
C = rand(15,2); % just 3 diff length matrices
cell = {A B C}; % ABC into cell array
nrows = cellfun(@length, combi); %get rows in each cell
sum_rows = sum(nrows);% get total rows required
Final = zeros(sum_rows,2); % pre-allocate matrix of appropriate size
Please help me to formulate a loop (over n cells in cell array) which adds the nth cell to the Final matrix each iteration. Thanks very much for any help.
Jasper
0 Kommentare
Akzeptierte Antwort
Andrei Bobrov
am 11 Nov. 2014
A = rand(5,2);
B = rand(7,2);
C = rand(15,2);
cc = {A B C};
out = cat(1,cc{:});
1 Kommentar
Subhosit Ray
am 1 Jun. 2018
Verschoben: Dyuman Joshi
am 31 Jan. 2024
you make things look so simple =) good job andrei
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