func TestBidiagReduceUnblocked(t *testing.T) {
N := 217
M := 269
conf := gomas.NewConf()
conf.LB = 0
zeromean := cmat.NewFloatNormSource()
A := cmat.NewMatrix(M, N)
A.SetFrom(zeromean)
tauq := cmat.NewMatrix(N, 1)
taup := cmat.NewMatrix(N, 1)
At := cmat.NewMatrix(N, M)
blasd.Transpose(At, A)
tauqt := cmat.NewMatrix(N, 1)
taupt := cmat.NewMatrix(N, 1)
W := lapackd.Workspace(M + N)
lapackd.BDReduce(A, tauq, taup, W, conf)
lapackd.BDReduce(At, tauqt, taupt, W, conf)
// BiRed(A) == BiRed(A.T).T
blasd.Plus(At, A, 1.0, -1.0, gomas.TRANSB)
blasd.Axpy(tauqt, taup, -1.0)
blasd.Axpy(taupt, tauq, -1.0)
nrm := lapackd.NormP(At, lapackd.NORM_ONE)
t.Logf("M=%d, N=%d || BiRed(A) - BiRed(A.T).T||_1 : %e\n", M, N, nrm)
nrm = lapackd.NormP(taupt, lapackd.NORM_ONE)
t.Logf(" || BiRed(A).tauq - BiRed(A.T).taup||_1 : %e\n", nrm)
nrm = lapackd.NormP(tauqt, lapackd.NORM_ONE)
t.Logf(" || BiRed(A).taup - BiRed(A.T).tauq||_1 : %e\n", nrm)
}
func TestBiredWide(t *testing.T) {
N := 811
M := 693
nb := 32
conf := gomas.NewConf()
conf.LB = 0
ediag := -1
zeromean := cmat.NewFloatNormSource()
A := cmat.NewMatrix(M, N)
A.SetFrom(zeromean)
A0 := cmat.NewCopy(A)
tauq := cmat.NewMatrix(N, 1)
taup := cmat.NewMatrix(N, 1)
W := lapackd.Workspace(M + N)
lapackd.BDReduce(A, tauq, taup, W, conf)
var D, E, Bd, Be cmat.FloatMatrix
D.Diag(A)
E.Diag(A, ediag)
B := cmat.NewMatrix(M, N)
Bd.Diag(B)
Be.Diag(B, ediag)
blasd.Copy(&Bd, &D)
blasd.Copy(&Be, &E)
Bt := cmat.NewMatrix(N, M)
blasd.Transpose(Bt, B)
conf.LB = nb
W0 := lapackd.Workspace(lapackd.BDMultWork(B, conf))
lapackd.BDMult(B, A, tauq, W0, gomas.MULTQ|gomas.LEFT, conf)
lapackd.BDMult(Bt, A, tauq, W0, gomas.MULTQ|gomas.RIGHT|gomas.TRANS, conf)
lapackd.BDMult(B, A, taup, W0, gomas.MULTP|gomas.RIGHT|gomas.TRANS, conf)
lapackd.BDMult(Bt, A, taup, W0, gomas.MULTP|gomas.LEFT, conf)
blasd.Plus(B, A0, 1.0, -1.0, gomas.NONE)
nrm := lapackd.NormP(B, lapackd.NORM_ONE)
t.Logf("M=%d, N=%d ||A - Q*B*P.T||_1 : %e\n", M, N, nrm)
blasd.Plus(Bt, A0, 1.0, -1.0, gomas.TRANSB)
nrm = lapackd.NormP(Bt, lapackd.NORM_ONE)
t.Logf("M=%d, N=%d ||A.T - P*B.T*Q.T||_1 : %e\n", M, N, nrm)
}
// test: ||C - Q*Q.T*C||_1 ~= 0;
// multipling from left requires: m(C) == n(A) [n(Q)]
func TestLQMultLeft(t *testing.T) {
M := 771
N := 813
nb := 16
conf := gomas.NewConf()
A := cmat.NewMatrix(M, N)
src := cmat.NewFloatNormSource()
A.SetFrom(src)
// C0 := A
C0 := cmat.NewCopy(A)
C1t := cmat.NewMatrix(N, M)
blasd.Transpose(C1t, C0)
C2t := cmat.NewCopy(C1t)
tau := cmat.NewMatrix(M, 1)
W := cmat.NewMatrix(M+N, 1)
conf.LB = 0
lapackd.LQFactor(A, tau, W, conf)
// A0 := Q.T*A0
conf.LB = 0
lapackd.LQMult(C2t, A, tau, W, gomas.LEFT, conf)
lapackd.LQMult(C2t, A, tau, W, gomas.LEFT|gomas.TRANS, conf)
// A0 := Q.T*A0
conf.LB = nb
W1 := lapackd.Workspace(lapackd.LQMultWork(C1t, gomas.LEFT, conf))
lapackd.LQMult(C1t, A, tau, W1, gomas.LEFT, conf)
lapackd.LQMult(C1t, A, tau, W1, gomas.LEFT|gomas.TRANS, conf)
blasd.Plus(C0, C1t, 1.0, -1.0, gomas.TRANSB)
nrm := lapackd.NormP(C0, lapackd.NORM_ONE)
t.Logf("M=%d, N=%d, ||C - Q*Q*T*C||_1: %e\n", M, N, nrm)
blasd.Plus(C1t, C2t, 1.0, -1.0, gomas.NONE)
nrm = lapackd.NormP(C1t, lapackd.NORM_ONE)
t.Logf("M=%d, N=%d, ||unblk(Q*Q.T*C) - blk(Q*Q*T*C)||_1: %e\n", M, N, nrm)
}