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lapack/testlapack: replace all literal constants in dgesvdTest with tol expressions

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This commit is contained in:
Dan Kortschak
2019-03-30 21:36:31 +10:30
parent 9a0642d3dd
commit 3d26580ed4
1 changed files with 6 additions and 6 deletions
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12
lapack/testlapack/dgesvd.go
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@@ -164,7 +164,7 @@ func dgesvdTest(t *testing.T, impl Dgesvder, m, n, mtype int, tol float64) {
// Check that uAll, sAll, and vtAll multiply back to A by computing a residual
// |A - U*S*VT| / (n*aNorm)
if resid := svdFullResidual(m, n, aNorm, aCopy, lda, uAll, ldu, sAll, vtAll, ldvt); resid > 1e-13 {
if resid := svdFullResidual(m, n, aNorm, aCopy, lda, uAll, ldu, sAll, vtAll, ldvt); resid > tol {
t.Errorf("Case %v: original matrix not recovered for full SVD, |A - U*D*VT|=%v", prefix, resid)
}
if minmn > 0 {
@@ -238,14 +238,14 @@ func dgesvdTest(t *testing.T, impl Dgesvder, m, n, mtype int, tol float64) {
if !hasOrthonormalColumns(blas64.General{Rows: m, Cols: minmn, Data: u, Stride: ldu}) {
t.Errorf("Case %v: columns of U are not orthogonal", prefix)
}
if res := svdPartialUResidual(m, minmn, u, uAll, ldu); res > 1e-13 {
if res := svdPartialUResidual(m, minmn, u, uAll, ldu); res > tol {
t.Errorf("Case %v: columns of U do not match UAll", prefix)
}
case lapack.SVDAll:
if !hasOrthonormalColumns(blas64.General{Rows: m, Cols: m, Data: u, Stride: ldu}) {
t.Errorf("Case %v: columns of U are not orthogonal", prefix)
}
if res := svdPartialUResidual(m, m, u, uAll, ldu); res > 1e-13 {
if res := svdPartialUResidual(m, m, u, uAll, ldu); res > tol {
t.Errorf("Case %v: columns of U do not match UAll", prefix)
}
}
@@ -255,14 +255,14 @@ func dgesvdTest(t *testing.T, impl Dgesvder, m, n, mtype int, tol float64) {
if !hasOrthonormalRows(blas64.General{Rows: minmn, Cols: n, Data: vtAll, Stride: ldvt}) {
t.Errorf("Case %v: rows of VT are not orthogonal", prefix)
}
if res := svdPartialVTResidual(minmn, n, vt, vtAll, ldvt); res > 1e-13 {
if res := svdPartialVTResidual(minmn, n, vt, vtAll, ldvt); res > tol {
t.Errorf("Case %v: rows of VT do not match VTAll", prefix)
}
case lapack.SVDAll:
if !hasOrthonormalRows(blas64.General{Rows: n, Cols: n, Data: vtAll, Stride: ldvt}) {
t.Errorf("Case %v: rows of VT are not orthogonal", prefix)
}
if res := svdPartialVTResidual(n, n, vt, vtAll, ldvt); res > 1e-13 {
if res := svdPartialVTResidual(n, n, vt, vtAll, ldvt); res > tol {
t.Errorf("Case %v: rows of VT do not match VTAll", prefix)
}
}
@@ -274,7 +274,7 @@ func dgesvdTest(t *testing.T, impl Dgesvder, m, n, mtype int, tol float64) {
if floats.Min(s) < 0 {
t.Errorf("Case %v: some singular values from full SVD are negative", prefix)
}
if !floats.EqualApprox(s, sAll, 1e-14) {
if !floats.EqualApprox(s, sAll, tol/10) {
t.Errorf("Case %v: singular values differ between full and partial SVD\n%v\n%v", prefix, s, sAll)
}
}