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Concatenate matrices from cell array

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Jasper
Jasper 2014-11-11
移动：Dyuman Joshi 2024-1-31
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

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Andrei Bobrov
Andrei Bobrov 2014-11-11
A = rand(5,2);
B = rand(7,2);
C = rand(15,2);
cc = {A B C};
out = cat(1,cc{:});

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