| Re: minor bug in IDL 5 poisson random numbers? [message #12607] |
Mon, 24 August 1998 00:00 |
Craig Markwardt
Messages: 1869
Registered: November 1996
|
Senior Member |
|
|
Bruce Macintosh <bmac@igpp.llnl.gov> writes:
>
> The statement
>
> test=randomn(seed,10,poisson=50)
>
> seems to generate a
> % Program caused arithmetic error: Floating underflow
>
> on my ultrasparc/solaris system about half the time. Presumably this
> is just some minor math thing - something in an exponential is
> getting very small - but it's faintly disconcerting and causes me to
> worry about the validity of the results. Does anyone have any
> comments?
I get this error message a lot running on the Alpha and Ultrasparc
platforms, when using the function MACHAR (which returns machine
precision constants, especially when doing MACHAR(/DOUBLE)). So far
there are no problems, but I agree that this is an upsetting error
message to see, and can also hide other legitimate errors.
Craig
--
------------------------------------------------------------ --------------
Craig B. Markwardt, Ph.D. EMAIL: craigmnet@astrog.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
------------------------------------------------------------ --------------
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
