26 lines
518 B
C++
26 lines
518 B
C++
/*
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* SPQRUtil.h
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*
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* Created on: Jul 1, 2010
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* Author: nikai
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* Description: the utility functions for SPQR
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*/
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#pragma once
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#include "Matrix.h"
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#ifdef GT_USE_LAPACK
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#include <spqr_mini/spqr_subset.hpp>
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namespace gtsam {
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/** make stairs and speed up householder_spqr. Stair is defined as the row index of where zero entries start in each column */
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long* MakeStairs(Matrix &A);
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/** Householder tranformation, zeros below diagonal */
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void householder_spqr(Matrix &A, long* Stair = NULL);
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}
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#endif
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