---
name: "dlat2s"
section: "3lapack"
platform: "linux"
package: "liblapack-doc"
version: "3.2.1-8"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/dlat2s/3lapack"
---

# dlat2s(3lapack)

converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE PRECISION triangular matrix, A

## NAME

DLAT2S - converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE PRECISION triangular matrix, A

## SYNOPSIS

- SUBROUTINE DLAT2S(

  UPLO, N, A, LDA, SA, LDSA, INFO )

- CHARACTER

  UPLO

- INTEGER

  INFO, LDA, LDSA, N

- REAL

  SA( LDSA, \* )

- DOUBLE

  PRECISION A( LDA, \* )

## 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.

## ARGUMENTS

- UPLO (input) CHARACTER\*1

  \= 'U':  A is upper triangular;\
   \= 'L':  A is lower triangular.

- N (input) INTEGER

  The number of rows and columns of the matrix A.  N \>= 0.

- A (input) DOUBLE PRECISION array, dimension (LDA,N)

  On entry, the N-by-N triangular coefficient matrix A.

- LDA (input) INTEGER

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

- SA (output) 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 (input) INTEGER

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

- INFO (output) 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. ========= End of DLAT2S