MATLAB: Switch two row of matrix

matrix manipulationrow

How to switch two row of matrix? For example: matrix A is: 1 3 4; 2 4 5 and Y want to be 2 4 5; 1 3 4 ?

Best Answer

A=[1 3 4; 2 4 5]
A([1 2],:)=A([2 1],:)

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MATLAB: How to check and update one matrix by comparing the element of another matrix

Use ismember with the 'rows' option:

A = [1 2 3; 1 2 4; 1 2 5; 1 3 4; 1 3 5; 1 4 5; 2 3 4; 2 3 5; 2 4 5; 3 4 5];
B = [1 2; 2 3; 4 5]; %reduced second matrix so some rows of A are missing
isrowpresent = ismember(A(:, [2 3]), B, 'rows');
A(~isrowpresent, :) = [] %delete rows not present

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