pivots

compas.numerical.pivots(U, tol=None)

Identify the pivots of input matrix U.

Parameters:

Uarray-like

Matrix U represented as an array or list.

Returns:

list

Pivot column indices.

Notes

If the matrix U is in Reduced Row Echelon Form, the pivots are the columns with leading non-zero coefficients per row.

Examples

>>> A = [[1, 0, 1, 3], [2, 3, 4, 7], [-1, -3, -3, -4]]
>>> n = rref_sympy(A)
>>> pivots(n)
[0, 1]