Check the upper or lower triangular matrix

Question

Is there a way, using numpy or scipy, to check if the matrix is ​​a lower or upper triangular matrix ?. I know how to make a function to verify this; but I would like to know if these modules have their own functions. I am looking in the documentation but haven't found anything.

Answer 1

I would do

np.allclose(mat, np.tril(mat)) # check if lower triangular np.allclose(mat, np.triu(mat)) # check if upper triangular np.allclose(mat, np.diag(np.diag(mat))) # check if diagonal 

• http://docs.scipy.org/doc/numpy/reference/generated/numpy.tril.html
• http://docs.scipy.org/doc/numpy/reference/generated/numpy.triu.html
• http://docs.scipy.org/doc/numpy/reference/generated/numpy.allclose.html
• http://docs.scipy.org/doc/numpy/reference/generated/numpy.diag.html