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tril

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])

See also

triu, ones, eye, diag
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