How to take elements row wise or column wise in a 2d array

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A is a 5*5 array. Its needed to take 7 elements along the 1st column and 2 from the beginning of 2nd column.So the window size is 7.Now that makes it possible to take 3 windows.So 4 elements are left.this last window should be 4 leftover elements and rest zeroes.How to have a loop that gives me the 4 windows in a variable
per isakson
per isakson on 1 Jan 2017
In your question you say
  • "a 5*5 array" &nbsp
  • "take 7 elements [window] along" &nbsp
  • "that gives me the 4 windows in a variable" &nbsp
  • "matrix signalprocess" &nbsp
"generalize" &nbsp Yes, but in what way? Arbitrary size of the input matrix and/or the window? Along columns or rows? ...

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Accepted Answer

Walter Roberson
Walter Roberson on 31 Dec 2016
  1 Comment
Walter Roberson
Walter Roberson on 1 Jan 2017
window = 7;
A = randi(5,5);
n = numel(A);
left_over = mod(n, window);
if left_over == 0
stream = A(:);
stream = [A(:); zeros(window - left_over, 1)];
output = reshape(stream, window, []);

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