Re: [Oorexx-devel] rxMath -> rxm.class help sought

[Walter P. <chr...@ch...>]

thank you for the quick replies!
Just reading/skimming my program and telling me if/what I should do differently would save me from repeating blunder for all the other routines (I mean the checking for correct arguments)
--
Walter Pachl

---- Rick McGuire <obj...@gm...> schrieb:
> I'm not sure why there's such surprise/disappointment on Condition('D').
>  To the best of my knowledge, no SYNTAX conditions return anything for
> that.  If you wish to have something, you can specify a description on the
> RAISE instruction.  Other than that, I'm not sure I can be much help here.
>  I'm not totally surprised that a Rexx version of the calculation might
> differ from a C library one in the last digit given that differences in how
> the calculations are performed and rounding is done.
> 
> Rick
> 
> 
> On Sat, Apr 5, 2014 at 12:53 PM, Walter Pachl
> <chr...@ch...>wrote:
> 
> > Rxm
> >                                                5 March 2014
> >
> >
> >
> > The distribution of ooRexx contains a function package called rxMath that
> > provides the computation of trigonometric and some other functions.
> >
> > Based on the underlying c-library the precision of the returned values is
> > limited to 16 digits.
> >
> > Close observation show that sometimes the last one or two digits of the
> > returned values are not correct.
> >
> > Many years ago I experimented with implementing these functions in Rexx
> > with its virtually unlimited precision.
> >
> > The rxm class is intended to provide the same functionality as rxMath with
> > no limit on the specified or implied precision.
> >
> > While I tried to get full compatibility there remain a few (actually very
> > few) differences:
> >
> >
> >
> > -       RxCalcTan(90) raises the Syntax condition
> >
> > -       rxCalcexp(x) limits x to 709. or so.
> >
> >
> >
> > Handling of syntactically incorrect arguments is still to be finished!
> >
> >
> >
> > The program testexp.rex shows what I have coded so far.
> >
> > You can see the 3 discrepancies when comparing rxm and rxMath.
> >
> > The surprise (disappointment) is that *condition('D')* returns nothing
> > whatsoever
> >
> >
> >
> > Any help / advice / critique would be highly appreciated
> >
> >
> >
> > Thanks
> >
> >
> >
> > Walter
> >
> >
> >
> > PS rxmexp etc. will eventually be changed to rxCalcexp to become
> > compatible with rxMath!
> >
> >
> >
> >
> >
> > Find the program at
> >
> > https://www.dropbox.com/sh/9v939j55ikderfx/SYLv80C-wP?n=132389230
> >
> >
> >
> >
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