# dlat2s.f man page

dlat2s.f —

## Synopsis

### Functions/Subroutines

subroutinedlat2s(UPLO, N, A, LDA, SA, LDSA, INFO)DLAT2Sconverts a double-precision triangular matrix to a single-precision triangular matrix.

## Function/Subroutine Documentation

### subroutine dlat2s (characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, real, dimension( ldsa, * )SA, integerLDSA, integerINFO)

**DLAT2S** converts a double-precision triangular matrix to a single-precision triangular matrix.

**Purpose:**

```
DLAT2S converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE
PRECISION triangular matrix, A.
RMAX is the overflow for the SINGLE PRECISION arithmetic
DLAS2S checks that all the entries of A are between -RMAX and
RMAX. If not the convertion is aborted and a flag is raised.
This is an auxiliary routine so there is no argument checking.
```

**Parameters:**

*UPLO*

```
UPLO is CHARACTER*1
= 'U': A is upper triangular;
= 'L': A is lower triangular.
```

*N*

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

*A*

```
A is DOUBLE PRECISION array, dimension (LDA,N)
On entry, the N-by-N triangular coefficient matrix A.
```

*LDA*

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

*SA*

```
SA is REAL array, dimension (LDSA,N)
Only the UPLO part of SA is referenced. On exit, if INFO=0,
the N-by-N coefficient matrix SA; if INFO>0, the content of
the UPLO part of SA is unspecified.
```

*LDSA*

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

*INFO*

```
INFO is INTEGER
= 0: successful exit.
= 1: an entry of the matrix A is greater than the SINGLE
PRECISION overflow threshold, in this case, the content
of the UPLO part of SA in exit is unspecified.
```

**Author:**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

**Date:**

September 2012

Definition at line 112 of file dlat2s.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

dlat2s(3) is an alias of dlat2s.f(3).