LAPACK  3.4.2
LAPACK: Linear Algebra PACKage
 All Files Functions Groups
strttp.f File Reference

Go to the source code of this file.

Functions/Subroutines

subroutine strttp (UPLO, N, A, LDA, AP, INFO)
 STRTTP copies a triangular matrix from the standard full format (TR) to the standard packed format (TP).
 

Function/Subroutine Documentation

subroutine strttp ( character  UPLO,
integer  N,
real, dimension( lda, * )  A,
integer  LDA,
real, dimension( * )  AP,
integer  INFO 
)

STRTTP copies a triangular matrix from the standard full format (TR) to the standard packed format (TP).

Download STRTTP + dependencies [TGZ] [ZIP] [TXT]
Purpose:
 STRTTP copies a triangular matrix A from full format (TR) to standard
 packed format (TP).
Parameters
[in]UPLO
          UPLO is CHARACTER*1
          = 'U':  A is upper triangular.
          = 'L':  A is lower triangular.
[in]N
          N is INTEGER
          The order of the matrices AP and A.  N >= 0.
[in]A
          A is REAL array, dimension (LDA,N)
          On exit, the triangular matrix A.  If UPLO = 'U', the leading
          N-by-N upper triangular part of A contains the upper
          triangular part of the matrix A, and the strictly lower
          triangular part of A is not referenced.  If UPLO = 'L', the
          leading N-by-N lower triangular part of A contains the lower
          triangular part of the matrix A, and the strictly upper
          triangular part of A is not referenced.
[in]LDA
          LDA is INTEGER
          The leading dimension of the array A.  LDA >= max(1,N).
[out]AP
          AP is REAL array, dimension (N*(N+1)/2
          On exit, the upper or lower triangular matrix A, packed
          columnwise in a linear array. The j-th column of A is stored
          in the array AP as follows:
          if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
          if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.
[out]INFO
          INFO is INTEGER
          = 0:  successful exit
          < 0:  if INFO = -i, the i-th argument had an illegal value
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date
September 2012

Definition at line 105 of file strttp.f.

Here is the call graph for this function:

Here is the caller graph for this function: