Given an nxn matrix A, how do I produce a lower triangular matrix with ones on the diagonal?

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Emily Gallagher 2019-9-23

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回答： Fangjun Jiang 2019-9-23

Given an nxn matrix A, how do I produce a lower triangular matrix with ones on the diagonal?

I tried

A = rand(n,n);

L = tril(A,1) + diag(ones(1, size(A,1))) ;

but it isn't working.

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Fangjun Jiang 2019-9-23

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tril(A,-1)+eye(n)

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