code to form a matrix by selecting few elements randomly from another matrix

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nishitha 2014-10-10

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关闭： MATLAB Answer Bot 2021-8-20

i have a matrix with me which is a rectangular matrix of size 14*13. now i need to select some elements randomly from this matrix and form another matrix of size 14*13. can u give me the code for this as soon as possible.

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José-Luis 2014-10-10

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

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Jan 2014-10-11

The question is not clear. There is an infinite number of possible solutions.

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Answer 1

Image Analyst 2014-10-12

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Here's one possible situation. I'd be a mind reader though if I happened to pick exactly the scenario you were thinking of:

matrix1 = rand(14,13) % Sample data.
matrix2 = zeros(14, 13); % Initialize to all zeros.
% Get 20 random locations to haul over to matrix2.
numberToTransfer = 20
randomLocations = randperm(numel(matrix1), numberToTransfer);
% Transfer them over from matrix1 to the same locations in matrix2.
matrix2(randomLocations) = matrix1(randomLocations)