* 1-d roots (error handling)
@ 2002-12-30 13:50 Peter S. Christopher
2003-01-01 20:57 ` Brian Gough
0 siblings, 1 reply; 2+ messages in thread
From: Peter S. Christopher @ 2002-12-30 13:50 UTC (permalink / raw)
To: gsl-discuss
Hi list,
I'm using brents algorithm to find one dimensional roots, although
I don't think my question is restricted to brents algo. In the multi-root
package, the user defined function can return GSL_FAILURE to indicate to
the solver that a critical error has occurred. Then the solver returns an
appropriate error code. Can this be done with the one-d root
algorithms? The current interface has the 1-d user defined function
returning a double; if I return GSL_NAN from my user defined will the the
solver handle that like a critical error? Should it handle this like a
critical error?
Thanks in advance,
Pete Christopher
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: 1-d roots (error handling)
2002-12-30 13:50 1-d roots (error handling) Peter S. Christopher
@ 2003-01-01 20:57 ` Brian Gough
0 siblings, 0 replies; 2+ messages in thread
From: Brian Gough @ 2003-01-01 20:57 UTC (permalink / raw)
To: Peter S. Christopher; +Cc: gsl-discuss
Peter S. Christopher writes:
> I'm using brents algorithm to find one dimensional roots,
> although I don't think my question is restricted to brents algo. In
> the multi-root package, the user defined function can return
> GSL_FAILURE to indicate to the solver that a critical error has
> occurred. Then the solver returns an appropriate error code. Can
> this be done with the one-d root algorithms? The current interface
> has the 1-d user defined function returning a double; if I return
> GSL_NAN from my user defined will the the solver handle that like a
> critical error? Should it handle this like a critical error?
If the function returns a NaN/Inf it should lead to an error code of
GSL_EBADFUNC. If it doesn't please send a bug report (either for the
code or documentation). Thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2002-12-30 13:50 1-d roots (error handling) Peter S. Christopher
2003-01-01 20:57 ` Brian Gough
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