Merge pull request #201 from Bytom/v0.1

[bytom/vapor.git] / vendor / gonum.org / v1 / gonum / lapack / testlapack / dlasq1.go

diff --git a/vendor/gonum.org/v1/gonum/lapack/testlapack/dlasq1.go b/vendor/gonum.org/v1/gonum/lapack/testlapack/dlasq1.go
deleted file mode 100644 (file)
index ad37bb7..0000000
--- a/vendor/gonum.org/v1/gonum/lapack/testlapack/dlasq1.go
+++ /dev/null
@@ -1,88 +0,0 @@
-// 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"
-       "testing"
-
-       "golang.org/x/exp/rand"
-
-       "gonum.org/v1/gonum/blas"
-       "gonum.org/v1/gonum/blas/blas64"
-)
-
-type Dlasq1er interface {
-       Dlasq1(n int, d, e, work []float64) int
-       Dgetrfer
-}
-
-func Dlasq1Test(t *testing.T, impl Dlasq1er) {
-       rnd := rand.New(rand.NewSource(1))
-       bi := blas64.Implementation()
-       // TODO(btracey): Increase the size of this test when we have a more numerically
-       // stable way to test the singular values.
-       for _, n := range []int{1, 2, 5, 8} {
-               work := make([]float64, 4*n)
-               d := make([]float64, n)
-               e := make([]float64, n-1)
-               for cas := 0; cas < 1; cas++ {
-                       for i := range work {
-                               work[i] = rnd.Float64()
-                       }
-                       for i := range d {
-                               d[i] = rnd.NormFloat64() + 10
-                       }
-                       for i := range e {
-                               e[i] = rnd.NormFloat64()
-                       }
-                       ldm := n
-                       m := make([]float64, n*ldm)
-                       // Set up the matrix
-                       for i := 0; i < n; i++ {
-                               m[i*ldm+i] = d[i]
-                               if i != n-1 {
-                                       m[(i+1)*ldm+i] = e[i]
-                               }
-                       }
-
-                       ldmm := n
-                       mm := make([]float64, n*ldmm)
-                       bi.Dgemm(blas.Trans, blas.NoTrans, n, n, n, 1, m, ldm, m, ldm, 0, mm, ldmm)
-
-                       impl.Dlasq1(n, d, e, work)
-
-                       // Check that they are singular values. The
-                       // singular values are the square roots of the
-                       // eigenvalues of X^T * X
-                       mmCopy := make([]float64, len(mm))
-                       copy(mmCopy, mm)
-                       ipiv := make([]int, n)
-                       for elem, sv := range d[0:n] {
-                               copy(mm, mmCopy)
-                               lambda := sv * sv
-                               for i := 0; i < n; i++ {
-                                       mm[i*ldm+i] -= lambda
-                               }
-
-                               // Compute LU.
-                               ok := impl.Dgetrf(n, n, mm, ldmm, ipiv)
-                               if !ok {
-                                       // Definitely singular.
-                                       continue
-                               }
-                               // Compute determinant
-                               var logdet float64
-                               for i := 0; i < n; i++ {
-                                       v := mm[i*ldm+i]
-                                       logdet += math.Log(math.Abs(v))
-                               }
-                               if math.Exp(logdet) > 2 {
-                                       t.Errorf("Incorrect singular value. n = %d, cas = %d, elem = %d, det = %v", n, cas, elem, math.Exp(logdet))
-                               }
-                       }
-               }
-       }
-}