# dlacpy.f man page

dlacpy.f —

## Synopsis

### Functions/Subroutines

subroutinedlacpy(UPLO, M, N, A, LDA, B, LDB)DLACPYcopies all or part of one two-dimensional array to another.

## Function/Subroutine Documentation

### subroutine dlacpy (characterUPLO, integerM, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB)

**DLACPY** copies all or part of one two-dimensional array to another.

**Purpose:**

```
DLACPY copies all or part of a two-dimensional matrix A to another
matrix B.
```

**Parameters:**

*UPLO*

```
UPLO is CHARACTER*1
Specifies the part of the matrix A to be copied to B.
= 'U': Upper triangular part
= 'L': Lower triangular part
Otherwise: All of the matrix A
```

*M*

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

*N*

```
N is INTEGER
The number of columns of the matrix A. N >= 0.
```

*A*

```
A is DOUBLE PRECISION array, dimension (LDA,N)
The m by n matrix A. If UPLO = 'U', only the upper triangle
or trapezoid is accessed; if UPLO = 'L', only the lower
triangle or trapezoid is accessed.
```

*LDA*

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

*B*

```
B is DOUBLE PRECISION array, dimension (LDB,N)
On exit, B = A in the locations specified by UPLO.
```

*LDB*

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

**Author:**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

**Date:**

September 2012

Definition at line 104 of file dlacpy.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

dlacpy(3) is an alias of dlacpy.f(3).