Frequently Asked Questions about IMSL

The following are questions that have been submitted to the ITC Research Computing Support Group email address res-consult@virginia.edu concerning the technical computing software IMSL.

  1. I have a program that calls an IMSL routine and I get somewhat different results when I run it on the RS/6000 cluster blue.unix versus on the Unixlab Suns and SGIs. Why is that?

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I have a program that calls an IMSL routine and I get somewhat different results when I run it on the RS/6000 cluster blue.unix versus on the Unixlab Suns and SGIs. Why is that? 

This behavior is not unexpected.  Using single precision, we typically
do see platform differences in the results for some routines. If you
use the double precision version of the routine and convert the
variables the routine uses to double precision, the difference in the
results should disappear.

DATE: 10/17/00

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