LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ dtsqr01()

subroutine dtsqr01 ( character  tssw,
integer  m,
integer  n,
integer  mb,
integer  nb,
double precision, dimension(6)  result 
)

DTSQR01

Purpose:
 DTSQR01 tests DGEQR , DGELQ, DGEMLQ and DGEMQR.
Parameters
[in]TSSW
          TSSW is CHARACTER
          'TS' for testing tall skinny QR
               and anything else for testing short wide LQ
[in]M
          M is INTEGER
          Number of rows in test matrix.
[in]N
          N is INTEGER
          Number of columns in test matrix.
[in]MB
          MB is INTEGER
          Number of row in row block in test matrix.
[in]NB
          NB is INTEGER
          Number of columns in column block test matrix.
[out]RESULT
          RESULT is DOUBLE PRECISION array, dimension (6)
          Results of each of the six tests below.

          RESULT(1) = | A - Q R | or | A - L Q |
          RESULT(2) = | I - Q^H Q | or | I - Q Q^H |
          RESULT(3) = | Q C - Q C |
          RESULT(4) = | Q^H C - Q^H C |
          RESULT(5) = | C Q - C Q |
          RESULT(6) = | C Q^H - C Q^H |
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.