LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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dtzt02.f File Reference

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Functions/Subroutines

DOUBLE PRECISION function dtzt02 (M, N, AF, LDA, TAU, WORK, LWORK)
 DTZT02 More...
 

Function/Subroutine Documentation

DOUBLE PRECISION function dtzt02 ( integer  M,
integer  N,
double precision, dimension( lda, * )  AF,
integer  LDA,
double precision, dimension( * )  TAU,
double precision, dimension( lwork )  WORK,
integer  LWORK 
)

DTZT02

Purpose:
 DTZT02 returns
      || I - Q'*Q || / ( M * eps)
 where the matrix Q is defined by the Householder transformations
 generated by DTZRQF.
Parameters
[in]M
          M is INTEGER
          The number of rows of the matrix AF.
[in]N
          N is INTEGER
          The number of columns of the matrix AF.
[in]AF
          AF is DOUBLE PRECISION array, dimension (LDA,N)
          The output of DTZRQF.
[in]LDA
          LDA is INTEGER
          The leading dimension of the array AF.
[in]TAU
          TAU is DOUBLE PRECISION array, dimension (M)
          Details of the Householder transformations as returned by
          DTZRQF.
[out]WORK
          WORK is DOUBLE PRECISION array, dimension (LWORK)
[in]LWORK
          LWORK is INTEGER
          length of WORK array. Must be >= N*N+N
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date
November 2011

Definition at line 91 of file dtzt02.f.

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