# clarcm.f

Section: LAPACK (3)
Updated: Tue Nov 14 2017
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clarcm.f

## SYNOPSIS

### Functions/Subroutines

subroutine clarcm (M, N, A, LDA, B, LDB, C, LDC, RWORK)
CLARCM copies all or part of a real two-dimensional array to a complex array.

## Function/Subroutine Documentation

### subroutine clarcm (integer M, integer N, real, dimension( lda, * ) A, integer LDA, complex, dimension( ldb, * ) B, integer LDB, complex, dimension( ldc, * ) C, integer LDC, real, dimension( * ) RWORK)

CLARCM copies all or part of a real two-dimensional array to a complex array.

Purpose:

``` CLARCM performs a very simple matrix-matrix multiplication:
C := A * B,
where A is M by M and real; B is M by N and complex;
C is M by N and complex.
```

Parameters:

M

```          M is INTEGER
The number of rows of the matrix A and of the matrix C.
M >= 0.
```

N

```          N is INTEGER
The number of columns and rows of the matrix B and
the number of columns of the matrix C.
N >= 0.
```

A

```          A is REAL array, dimension (LDA, M)
On entry, A contains the M by M matrix A.
```

LDA

```          LDA is INTEGER
The leading dimension of the array A. LDA >=max(1,M).
```

B

```          B is COMPLEX array, dimension (LDB, N)
On entry, B contains the M by N matrix B.
```

LDB

```          LDB is INTEGER
The leading dimension of the array B. LDB >=max(1,M).
```

C

```          C is COMPLEX array, dimension (LDC, N)
On exit, C contains the M by N matrix C.
```

LDC

```          LDC is INTEGER
The leading dimension of the array C. LDC >=max(1,M).
```

RWORK

```          RWORK is REAL array, dimension (2*M*N)
```

Author:

Univ. of Tennessee

Univ. of California Berkeley