SGET38
Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
November 2006
November 2006
Purpose
SGET38 tests STRSEN, a routine for estimating condition numbers of a
cluster of eigenvalues and/or its associated right invariant subspace
The test matrices are read from a file with logical unit number NIN.
cluster of eigenvalues and/or its associated right invariant subspace
The test matrices are read from a file with logical unit number NIN.
Arguments
| RMAX |
(output) REAL array, dimension (3)
Values of the largest test ratios.
RMAX(1) = largest residuals from SHST01 or comparing different calls to STRSEN RMAX(2) = largest error in reciprocal condition numbers taking their conditioning into account RMAX(3) = largest error in reciprocal condition numbers not taking their conditioning into account (may be larger than RMAX(2)) |
| LMAX |
(output) INTEGER array, dimension (3)
LMAX(i) is example number where largest test ratio
RMAX(i) is achieved. Also: If SGEHRD returns INFO nonzero on example i, LMAX(1)=i If SHSEQR returns INFO nonzero on example i, LMAX(2)=i If STRSEN returns INFO nonzero on example i, LMAX(3)=i |
| NINFO |
(output) INTEGER array, dimension (3)
NINFO(1) = No. of times SGEHRD returned INFO nonzero
NINFO(2) = No. of times SHSEQR returned INFO nonzero NINFO(3) = No. of times STRSEN returned INFO nonzero |
| KNT |
(output) INTEGER
Total number of examples tested.
|
| NIN |
(input) INTEGER
Input logical unit number.
|