Re: [Plplot-devel] Re: plgriddata and Directory Changes README! [was: Re: [Plplot-devel] Next release]

[Joao C. <jc...@fe...>]

On Friday 28 February 2003 21:20, Alan W. Irwin wrote:
> On Fri, 28 Feb 2003, [iso-8859-1] Jo=E3o Cardoso wrote:
> > | I agree, but you did not answer my question, probably because I mad=
e
> > | a typo. Here I go again: Can't you cast the values returned by nn/c=
sa
> > | with PLFLT?
> >
> > No, data arrays are passed by reference. With nn/csa/qhull array data
> > flows in both directions.
> > If the user wants to use floats because he has huge amounts of float
> > data we would have convert it all back and forth. And the main user
> > concern, memory space, would be jeopardized anyway.
>
> I take your point about memory space, but users may still want
> single-precision to work as a convenience because their application
> programme is inherently single precision.  We do serve the scientific
> plotting community, and there is still a large number of fortran
> single-precision applications around (as I am just re-discovering in my
> current contract). It is extremely convenient to be able to use PLplot
> directly from such a large application without having to do anything
> special with the precision of the PLplot arguments (or the inconvenient
> alternative of writing the results to a file which is then read by a
> special
> double-precision PLplot application).
>
> Thus, I hope very much that you do make an effort to completely support
> both single and double (by allocating the space, copying the arrays, et=
c.)
> just as in the rest of PLplot.

Please see my other e-mail on "configuration defaults". In short, I think=
 that=20
if the user has specified float we must not use doubles.

Joao

>
> Alan
> __________________________
> Alan W. Irwin
> email: ir...@be...
> phone: 250-727-2902
>
> Astronomical research affiliation with Department of Physics and Astron=
omy,
> University of Victoria (astrowww.phys.uvic.ca).
>
> Programming affiliations with the Canadian Centre for Climate Modelling=
 and
> Analysis (www.cccma.bc.ec.gc.ca) and the PLplot scientific plotting
> software package (plplot.org).
>
> __________________________
>
> Linux-powered Science
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