| // Copyright ©2015 The gonum Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package testlapack |
| |
| import ( |
| "math/rand" |
| "testing" |
| ) |
| |
| type Dgetrfer interface { |
| Dgetrf(m, n int, a []float64, lda int, ipiv []int) bool |
| } |
| |
| func DgetrfTest(t *testing.T, impl Dgetrfer) { |
| rnd := rand.New(rand.NewSource(1)) |
| for _, test := range []struct { |
| m, n, lda int |
| }{ |
| {10, 5, 0}, |
| {5, 10, 0}, |
| {10, 10, 0}, |
| {300, 5, 0}, |
| {3, 500, 0}, |
| {4, 5, 0}, |
| {300, 200, 0}, |
| {204, 300, 0}, |
| {1, 3000, 0}, |
| {3000, 1, 0}, |
| {10, 5, 20}, |
| {5, 10, 20}, |
| {10, 10, 20}, |
| {300, 5, 400}, |
| {3, 500, 600}, |
| {200, 200, 300}, |
| {300, 200, 300}, |
| {204, 300, 400}, |
| {1, 3000, 4000}, |
| {3000, 1, 4000}, |
| } { |
| m := test.m |
| n := test.n |
| lda := test.lda |
| if lda == 0 { |
| lda = n |
| } |
| a := make([]float64, m*lda) |
| for i := range a { |
| a[i] = rnd.Float64() |
| } |
| mn := min(m, n) |
| ipiv := make([]int, mn) |
| for i := range ipiv { |
| ipiv[i] = rnd.Int() |
| } |
| |
| // Cannot compare the outputs of Dgetrf and Dgetf2 because the pivoting may |
| // happen differently. Instead check that the LPQ factorization is correct. |
| aCopy := make([]float64, len(a)) |
| copy(aCopy, a) |
| ok := impl.Dgetrf(m, n, a, lda, ipiv) |
| checkPLU(t, ok, m, n, lda, ipiv, a, aCopy, 1e-10, false) |
| } |
| } |