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Test Matrices for the Singular Value Decomposition Drivers

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




Susan Blackford 2001-08-13