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how to swap rows of a matrix using command linalg::swapRow(A, 1, 2)

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studentambitious
studentambitious 2017-1-3
评论： Rakib Seemanto 2020-11-1
i need to swap two rows of a matrix.. how can i use the command linalg::swapRow(A, 1, 2)

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Walter Roberson
Walter Roberson 2017-1-3
feval(symengine, 'linalg::swapRow', A, 1, 2)
The output of this will be a symbolic matrix. If your matrix is numeric, then you should double() the result of the feval() to get back to numeric.
However... unless you are poking into the MuPAD engine, you are better off writing a small function:
function A = swapRow(A, row1, row2)
A([row2, row1], :) = A([row1, row2], :);

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Neel Shah
Neel Shah 2019-11-1
i want to swap rows of 3*3 matrix
i.e. first row become last
second row become second last
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