MATLAB: Count the number of non-zero elements of a column/row of a 2D-Matrix

matrix

Hello everyone,

I have a 2D Matrix and I want to make Matlab count the number of non-zero Elements within one row, is there a straightforward way to do this? Many thanks

Best Answer

sum(X(row_number,:)~=0)

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MATLAB: Rows which do not contain zero

row = any(D,2);
rowCount = sum(row);    %number of rows with non-zero elements

MATLAB: How to chose random row which contain non-zero element

I would first find the non-zero rows, then choose randomly amongst them:

nzr = find(sum(A,2)>0);                             % Indices Of Non-Zero Rows
random_nz_row = nzr(randi(length(nzr), 1))          % Choose One Non-Zero Row
nz_row = A(random_nz_row,:)                         % Display Random Non-Zero Row

Best Answer

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MATLAB: Rows which do not contain zero

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