LowerTriangularize

LowerTriangularize[m]
gives a matrix in which all but the lower triangular elements of m are replaced with zeros.

LowerTriangularize[m, k]
replaces with zeros only the elements above the k^(th) subdiagonal of m.

DetailsDetails

ExamplesExamplesopen allclose all

Basic Examples (2)Basic Examples (2)

Get the lower triangular part of a matrix:

In[1]:=
Click for copyable input
Out[1]//MatrixForm=

Get the strictly lower triangular part of a matrix:

In[1]:=
Click for copyable input
Out[1]//MatrixForm=
New in 7
New to Mathematica? Find your learning path »
Have a question? Ask support »