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mat: add Dense.PermuteRows and PermuteCols

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Vladimir Chalupecky
2023-09-26 11:56:15 +02:00
committed by Vladimír Chalupecký
parent 93ea0834e6
commit 5f74663ec0
4 changed files with 192 additions and 22 deletions
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12
lapack/lapack64/lapack64.go
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@@ -649,21 +649,21 @@ func Lantb(norm lapack.MatrixNorm, a blas64.TriangularBand, work []float64) floa
//
// X[i,0:n] is moved to X[k[i],0:n] for i=0,1,...,m-1.
//
// k must have length m, otherwise Lapmr will panic.
// k must have length m, otherwise Lapmr will panic. k is zero-indexed.
func Lapmr(forward bool, x blas64.General, k []int) {
lapack64.Dlapmr(forward, x.Rows, x.Cols, x.Data, max(1, x.Stride), k)
}
// Lapmt rearranges the columns of the m×n matrix X as specified by the
// permutation k_0, k_1, ..., k_{n-1} of the integers 0, ..., n-1.
// permutation k[0],k[1],...,k[n-1] of the integers 0,...,n-1.
//
// If forward is true a forward permutation is performed:
// If forward is true, a forward permutation is applied:
//
// X[0:m, k[j]] is moved to X[0:m, j] for j = 0, 1, ..., n-1.
// X[0:m,k[j]] is moved to X[0:m,j] for j=0,1,...,n-1.
//
// otherwise a backward permutation is performed:
// If forward is false, a backward permutation is applied:
//
// X[0:m, j] is moved to X[0:m, k[j]] for j = 0, 1, ..., n-1.
// X[0:m,j] is moved to X[0:m,k[j]] for j=0,1,...,n-1.
//
// k must have length n, otherwise Lapmt will panic. k is zero-indexed.
func Lapmt(forward bool, x blas64.General, k []int) {