TESTING/EIG/dchkec.f(3)

NAME
TESTING/EIG/dchkec.f

SYNOPSIS

  Functions/Subroutines
subroutine dchkec (thresh, tsterr, nin, nout)
DCHKEC

Function/Subroutine Documentation

  subroutine dchkec (double precision thresh, logical tsterr, integer nin, integer nout)

DCHKEC

Purpose:

     DCHKEC tests eigen- condition estimation routines
            DLALN2, DLASY2, DLANV2, DLAQTR, DLAEXC,
            DTRSYL, DTREXC, DTRSNA, DTRSEN, DTGEXC
     In all cases, the routine runs through a fixed set of numerical
     examples, subjects them to various tests, and compares the test
     results to a threshold THRESH. In addition, DTREXC, DTRSNA and DTRSEN
     are tested by reading in precomputed examples from a file (on input
     unit NIN).  Output is written to output unit NOUT.

Parameters
    THRESH

              THRESH is DOUBLE PRECISION
              Threshold for residual tests.  A computed test ratio passes
              the threshold if it is less than THRESH.

    TSTERR

              TSTERR is LOGICAL
              Flag that indicates whether error exits are to be tested.

    NIN

              NIN is INTEGER
              The logical unit number for input.

    NOUT

              NOUT is INTEGER
              The logical unit number for output.

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 75 of file dchkec.f.

Author

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