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comparison liboctave/PermMatrix.h @ 8958:6ccc12cc65ef

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implement raising a permutation matrix to integer power
author Jaroslav Hajek <highegg@gmail.com>
date Wed, 11 Mar 2009 14:07:24 +0100
parents eb63fbe60fab
children 3c1762c7e787
comparison
equal deleted inserted replaced
8957:360aa52b5942 8958:6ccc12cc65ef
95 PermMatrix inverse (void) const; 95 PermMatrix inverse (void) const;
96 96
97 // Determinant, i.e. the sign of permutation. 97 // Determinant, i.e. the sign of permutation.
98 octave_idx_type determinant (void) const; 98 octave_idx_type determinant (void) const;
99 99
100 // Efficient integer power of a permutation.
101 PermMatrix power (octave_idx_type n) const;
102
100 bool is_col_perm (void) const { return _colp; } 103 bool is_col_perm (void) const { return _colp; }
101 bool is_row_perm (void) const { return !_colp; } 104 bool is_row_perm (void) const { return !_colp; }
102 105
103 friend PermMatrix operator *(const PermMatrix& a, const PermMatrix& b); 106 friend PermMatrix operator *(const PermMatrix& a, const PermMatrix& b);
104 107