Is there an easy way to generate a random n×n-matrix in Sage that is lower triangular with ones on the diagonal and the entries are all in QQ or ZZ(or the natural numbers)?
Here is an example:
n = 5
Matrix(ZZ,n,n,lambda i,j: 1 if i==j else ZZ.random_element() if i>j else 0)Thank you, is there also a way to get only natural numbers instead of integers? I tried this, but it does not seem to work:
n = 14
PP = PositiveIntegers()
M=Matrix(PP,n,n,lambda i,j: 1 if i==j else PP.random_element() if i>j else 0)You can use abs(ZZ.random_element()).
Asked: 0 years ago
Seen: 191 times
Last updated: Jan 28
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