Cutting a Matrix Into a Triangle

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Pranav Murali
Pranav Murali 2020-7-6
回答： Rik 2020-7-6
Hey guys,
I know MATLAB has the triu and and tril functions that cut the upper and lower triangular portion of a matrix. The cut is made from the top left corner of the matrix to the bottom right corner of the matrix, like this image.
I have a 78x125 matrix and was wondering if there was a way to cut it from the top right corner to the bottom left corner?
Thanks,
Pranav Murali

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回答（1 个）

Rik
Rik 2020-7-6
Use fliplr to mirror the matrix, then use tril or triu, then mirror again with fliplr.

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