private static void dmach_test()
//****************************************************************************80
//
// Purpose:
//
// DMACH_TEST demonstrates DMACH.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 15 May 2006
//
// Author:
//
// John Burkardt
//
{
Console.WriteLine("");
Console.WriteLine("DMACH_TEST");
Console.WriteLine(" DMACH returns some approximate machine numbers.");
Console.WriteLine("");
int job = 1;
Console.WriteLine(" DMACH(1) = EPS = " + BLASData.dmach(job) + "");
job = 2;
Console.WriteLine(" DMACH(2) = TINY = " + BLASData.dmach(job) + "");
job = 3;
Console.WriteLine(" DMACH(3) = HUGE = " + BLASData.dmach(job) + "");
}
private static void dger_test()
//****************************************************************************80
//
// Purpose:
//
// DGER_TEST tests DGER.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 19 March 2017
//
// Author:
//
// John Burkardt
//
{
Console.WriteLine("");
Console.WriteLine("DGER_TEST");
Console.WriteLine(" DGER computes A := A + alpha * x * y'");
Console.WriteLine(" for a general matrix A.");
const int m = 5;
const int n = 4;
const double alpha = 2.0;
const char trans = 'N';
double[] a = BLASData.r8mat_test(trans, m, m, n);
double[] x = new double[m];
for (int i = 0; i < m; i++)
{
x[i] = i + 1;
}
const int incx = 1;
double[] y = new double[n];
for (int i = 0; i < n; i++)
{
y[i] = 10 * (i + 1);
}
const int incy = 1;
typeMethods.r8mat_print(m, n, a, " Matrix A:");
typeMethods.r8vec_print(m, x, " Vector X:");
typeMethods.r8vec_print(n, y, " Vector Y:");
BLAS2D.dger(m, n, alpha, x, incx, y, incy, ref a, m);
typeMethods.r8mat_print(m, n, a, " Result A = A + alpha * x * y");
}
private static void dgemm_test()
//****************************************************************************80
//
// Purpose:
//
// DGEMM_TEST tests DGEMM.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 10 February 2014
//
// Author:
//
// John Burkardt
//
{
Console.WriteLine("");
Console.WriteLine("DGEMM_TEST");
Console.WriteLine(" DGEMM carries out matrix multiplications");
Console.WriteLine(" for double precision real matrices.");
Console.WriteLine("");
Console.WriteLine(" 1: C = alpha * A * B + beta * C;");
Console.WriteLine(" 2: C = alpha * A' * B + beta * C;");
Console.WriteLine(" 3: C = alpha * A * B' + beta * C;");
Console.WriteLine(" 4: C = alpha * A' * B' + beta * C;");
Console.WriteLine("");
Console.WriteLine(" We carry out all four calculations, but in each case,");
Console.WriteLine(" we choose our input matrices so that we get the same result.");
//
// C = alpha * A * B + beta * C.
//
char transa = 'N';
char transb = 'N';
char transc = 'N';
int m = 4;
int n = 5;
int k = 3;
double alpha = 2.0;
int lda = m;
double[] a = BLASData.r8mat_test(transa, lda, m, k);
int ldb = k;
double[] b = BLASData.r8mat_test(transb, ldb, k, n);
double beta = 3.0;
int ldc = m;
double[] c = BLASData.r8mat_test(transc, ldc, m, n);
BLAS3D.dgemm(transa, transb, m, n, k, alpha, a, lda, b, ldb, beta, ref c, ldc);
typeMethods.r8mat_print(m, n, c, " C = alpha * A * B + beta * C:");
//
// C = alpha * A' * B + beta * C.
//
transa = 'T';
transb = 'N';
transc = 'N';
m = 4;
n = 5;
k = 3;
alpha = 2.0;
lda = k;
a = BLASData.r8mat_test(transa, lda, m, k);
ldb = k;
b = BLASData.r8mat_test(transb, ldb, k, n);
beta = 3.0;
ldc = m;
c = BLASData.r8mat_test(transc, ldc, m, n);
BLAS3D.dgemm(transa, transb, m, n, k, alpha, a, lda, b, ldb, beta, ref c, ldc);
typeMethods.r8mat_print(m, n, c, " C = alpha * A' * B + beta * C:");
//
// C = alpha * A * B' + beta * C.
//
transa = 'N';
transb = 'T';
transc = 'N';
m = 4;
n = 5;
k = 3;
alpha = 2.0;
lda = m;
a = BLASData.r8mat_test(transa, lda, m, k);
ldb = n;
b = BLASData.r8mat_test(transb, ldb, k, n);
beta = 3.0;
ldc = m;
c = BLASData.r8mat_test(transc, ldc, m, n);
BLAS3D.dgemm(transa, transb, m, n, k, alpha, a, lda, b, ldb, beta, ref c, ldc);
typeMethods.r8mat_print(m, n, c, " C = alpha * A * B' + beta * C:");
//
// C = alpha * A' * B' + beta * C.
//
transa = 'T';
transb = 'T';
transc = 'N';
m = 4;
n = 5;
k = 3;
alpha = 2.0;
lda = k;
a = BLASData.r8mat_test(transa, lda, m, k);
ldb = n;
b = BLASData.r8mat_test(transb, ldb, k, n);
beta = 3.0;
ldc = m;
c = BLASData.r8mat_test(transc, ldc, m, n);
BLAS3D.dgemm(transa, transb, m, n, k, alpha, a, lda, b, ldb, beta, ref c, ldc);
typeMethods.r8mat_print(m, n, c, " C = alpha * A' * B' + beta * C:");
}
private static void dtrsm_test()
//****************************************************************************80
//
// Purpose:
//
// DTRSM_TEST tests DTRSM.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 07 April 2014
//
// Author:
//
// John Burkardt
//
{
int i;
int j;
Console.WriteLine("");
Console.WriteLine("DTRSM_TEST");
Console.WriteLine(" DTRSM solves a linear system involving a triangular");
Console.WriteLine(" matrix A and a rectangular matrix B.");
Console.WriteLine("");
Console.WriteLine(" 1: Solve A * X = alpha * B;");
Console.WriteLine(" 2: Solve A' * X = alpha * B;");
Console.WriteLine(" 3: Solve X * A = alpha * B;");
Console.WriteLine(" 4: Solve X * A' = alpha * B;");
//
// Solve A * X = alpha * B.
//
char side = 'L';
char uplo = 'U';
char transa = 'N';
char diag = 'N';
int m = 4;
int n = 5;
double alpha = 2.0;
int lda = m;
int ldb = m;
double[] a = new double[lda * m];
for (j = 0; j < m; j++)
{
for (i = 0; i <= j; i++)
{
a[i + j * lda] = i + j + 2;
}
for (i = j + 1; i < m; i++)
{
a[i + j * lda] = 0.0;
}
}
char transb = 'N';
double[] b = BLASData.r8mat_test(transb, ldb, m, n);
BLAS3D.dtrsm(side, uplo, transa, diag, m, n, alpha, a, lda, ref b, ldb);
typeMethods.r8mat_print(m, n, b, " X = inv ( A ) * alpha * B:");
//
// Solve A' * X = alpha * B.
//
side = 'L';
uplo = 'U';
transa = 'T';
diag = 'N';
m = 4;
n = 5;
alpha = 2.0;
lda = m;
ldb = m;
a = new double[lda * m];
for (j = 0; j < m; j++)
{
for (i = 0; i <= j; i++)
{
a[i + j * lda] = i + j + 2;
}
for (i = j + 1; i < m; i++)
{
a[i + j * lda] = 0.0;
}
}
transb = 'N';
b = BLASData.r8mat_test(transb, ldb, m, n);
BLAS3D.dtrsm(side, uplo, transa, diag, m, n, alpha, a, lda, ref b, ldb);
typeMethods.r8mat_print(m, n, b, " X = inv ( A' ) * alpha * B:");
//
// Solve X * A = alpha * B.
//
side = 'R';
uplo = 'U';
transa = 'N';
diag = 'N';
m = 4;
n = 5;
alpha = 2.0;
lda = n;
ldb = m;
a = new double[lda * n];
for (j = 0; j < n; j++)
{
for (i = 0; i <= j; i++)
{
a[i + j * lda] = i + j + 2;
}
for (i = j + 1; i < n; i++)
{
a[i + j * lda] = 0.0;
}
}
transb = 'N';
b = BLASData.r8mat_test(transb, ldb, m, n);
BLAS3D.dtrsm(side, uplo, transa, diag, m, n, alpha, a, lda, ref b, ldb);
typeMethods.r8mat_print(m, n, b, " X = alpha * B * inv ( A ):");
//
// Solve X * A'' = alpha * B.
//
side = 'R';
uplo = 'U';
transa = 'T';
diag = 'N';
m = 4;
n = 5;
alpha = 2.0;
lda = n;
ldb = m;
a = new double[lda * n];
for (j = 0; j < n; j++)
{
for (i = 0; i <= j; i++)
{
a[i + j * lda] = i + j + 2;
}
for (i = j + 1; i < n; i++)
{
a[i + j * lda] = 0.0;
}
}
transb = 'N';
b = BLASData.r8mat_test(transb, ldb, m, n);
BLAS3D.dtrsm(side, uplo, transa, diag, m, n, alpha, a, lda, ref b, ldb);
typeMethods.r8mat_print(m, n, b, " X = alpha * B * inv ( A' ):");
}
private static void dtrmm_test()
//****************************************************************************80
//
// Purpose:
//
// DTRMM_TEST tests DTRMM.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 05 April 2014
//
// Author:
//
// John Burkardt
//
{
int i;
int j;
Console.WriteLine("");
Console.WriteLine("DTRMM_TEST");
Console.WriteLine(" DTRMM multiplies a triangular matrix A and a");
Console.WriteLine(" rectangular matrix B");
Console.WriteLine("");
Console.WriteLine(" 1: B = alpha * A * B;");
Console.WriteLine(" 2: B = alpha * A' * B;");
//
// B = alpha * A * B.
//
char side = 'L';
char uplo = 'U';
char transa = 'N';
char diag = 'N';
int m = 4;
int n = 5;
double alpha = 2.0;
int lda = m;
int ldb = m;
double[] a = new double[lda * m];
for (j = 0; j < m; j++)
{
for (i = 0; i <= j; i++)
{
a[i + j * lda] = i + j + 2;
}
for (i = j + 1; i < m; i++)
{
a[i + j * lda] = 0.0;
}
}
char transb = 'N';
double[] b = BLASData.r8mat_test(transb, ldb, m, n);
BLAS3D.dtrmm(side, uplo, transa, diag, m, n, alpha, a, lda, ref b, ldb);
typeMethods.r8mat_print(m, n, b, " B = alpha * A * B:");
//
// B = alpha * A' * B.
//
side = 'L';
uplo = 'U';
transa = 'T';
diag = 'N';
m = 4;
n = 5;
alpha = 2.0;
lda = m;
ldb = m;
a = new double[lda * m];
for (j = 0; j < m; j++)
{
for (i = 0; i <= j; i++)
{
a[i + j * lda] = i + j + 2;
}
for (i = j + 1; i < m; i++)
{
a[i + j * lda] = 0.0;
}
}
transb = 'N';
b = BLASData.r8mat_test(transb, ldb, m, n);
BLAS3D.dtrmm(side, uplo, transa, diag, m, n, alpha, a, lda, ref b, ldb);
typeMethods.r8mat_print(m, n, b, " B = alpha * A' * B:");
}
private static void dgemv_test()
//****************************************************************************80
//
// Purpose:
//
// DGEMV_TEST tests DGEMV.
//
// Licensing:
//
// This code is distributed under the GNU LGPL license.
//
// Modified:
//
// 19 March 2017
//
// Author:
//
// John Burkardt
//
{
Console.WriteLine("");
Console.WriteLine("DGEMV_TEST");
Console.WriteLine(" DGEMV computes y := alpha * A * x + beta * y");
Console.WriteLine(" or y := alpha * A'' * x + beta * y,");
Console.WriteLine(" for a general matrix A,");
//
// y = alpha * A * x + beta * y
//
char trans = 'N';
int m = 5;
int n = 4;
double alpha = 2.0;
int lda = m;
double[] a = BLASData.r8mat_test(trans, lda, m, n);
double[] x = new double[n];
for (int i = 0; i < n; i++)
{
x[i] = i + 1;
}
int incx = 1;
double beta = 3.0;
double[] y = new double[m];
for (int i = 0; i < m; i++)
{
y[i] = 10 * (i + 1);
}
int incy = 1;
typeMethods.r8mat_print(m, n, a, " Matrix A:");
typeMethods.r8vec_print(n, x, " Vector X:");
typeMethods.r8vec_print(m, y, " Vector Y:");
BLAS2D.dgemv(trans, m, n, alpha, a, lda, x, incx, beta, ref y, incy);
typeMethods.r8vec_print(m, y, " Result Y = alpha * A * x + beta * y");
//
// y = alpha * A' * x + beta * y
//
trans = 'T';
m = 5;
n = 4;
alpha = 2.0;
lda = m;
a = BLASData.r8mat_test(trans, lda, n, m);
x = new double[m];
for (int i = 0; i < m; i++)
{
x[i] = i + 1;
}
incx = 1;
beta = 3.0;
y = new double[n];
for (int i = 0; i < n; i++)
{
y[i] = 10 * (i + 1);
}
incy = 1;
typeMethods.r8mat_print(m, n, a, " Matrix A:");
typeMethods.r8vec_print(m, x, " Vector X:");
typeMethods.r8vec_print(n, y, " Vector Y:");
BLAS2D.dgemv(trans, m, n, alpha, a, lda, x, incx, beta, ref y, incy);
typeMethods.r8vec_print(n, y, " Result Y = alpha * A * x + beta * y");
}
