LAPACK  3.9.0
LAPACK: Linear Algebra PACKage

◆ dorhr_col01()

subroutine dorhr_col01 ( integer  M,
integer  N,
integer  MB1,
integer  NB1,
integer  NB2,
double precision, dimension(6)  RESULT 
)

DORHR_COL01

Purpose:
 DORHR_COL01 tests DORHR_COL using DLATSQR, DGEMQRT and DORGTSQR.
 Therefore, DLATSQR (part of DGEQR), DGEMQRT (part DGEMQR), DORGTSQR
 have to be tested before this test.
Parameters
[in]M
          M is INTEGER
          Number of rows in test matrix.
[in]N
          N is INTEGER
          Number of columns in test matrix.
[in]MB1
          MB1 is INTEGER
          Number of row in row block in an input test matrix.
[in]NB1
          NB1 is INTEGER
          Number of columns in column block an input test matrix.
[in]NB2
          NB2 is INTEGER
          Number of columns in column block in an output test matrix.
[out]RESULT
          RESULT is DOUBLE PRECISION array, dimension (6)
          Results of each of the six tests below.
          ( C is a M-by-N random matrix, D is a N-by-M random matrix )

          RESULT(1) = | A - Q * R | / (eps * m * |A|)
          RESULT(2) = | I - (Q**H) * Q | / (eps * m )
          RESULT(3) = | Q * C - Q * C | / (eps * m * |C|)
          RESULT(4) = | (Q**H) * C - (Q**H) * C | / (eps * m * |C|)
          RESULT(5) = | (D * Q) - D * Q | / (eps * m * |D|)
          RESULT(6) = | D * (Q**H) - D * (Q**H) | / (eps * m * |D|)
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date
November 2019