Five different types of test matrices may be generated for
the singular value decomposition drivers.
Table 12 shows the types available,
along with the numbers used to refer to the matrix types.
Except as noted, all matrices have 124#124 entries.
Table 12:
Test matrices for the singular value decomposition drivers
Eigenvalue Distribution
Type
Arithmetic
Geometric
Clustered
Random
Other
Zero
1
Identity
2
489#489
3, 426#26, 5126#126
26#26- matrix entries are multiplied by the
underflow-threshold/9#9
26#26- matrix entries are multiplied by the
overflow-threshold * 9#9
