Name
tril — lower triangular part of matrix
Calling Sequence
tril(x [,k])
Parameters
- x
matrix (real, complex, polynomial, rational)
- k
integer (default value 0)
Description
Lower triangle part of a matrix. tril(x,k) is
made by entries below the kth diagonal : k>0 (upper diagonal) and
k<0 (diagonals below the main diagonal).
Examples
s=poly(0,'s');
tril([s,s;s,1])
tril([1/s,1/s;1/s,1])