bug in argument processing of interpn (and documentation error)

[David Bateman]

Kris Thielemans wrote:
> Hi
>
> I find that the extrapval optional argument of interpn is ignored (at least
> in version 3.0.1). Example:
>
> octave.exe:175> interpn([1,2],[1,2],[1,2;3,4],1,3,'linear',5)
> ans = NA
>
> This can be easily fixed by modifying the argument processing by inserting 1
> line in interpn.m (marked with "KT fix" below):
>
>  % start quote from line 77
>   elseif (ischar (varargin{end - 1}))
>     if (! isnumeric (varargin{end}) || ! isscalar (varargin{end}))
>       error ("extrapal is expected to be a numeric scalar");
>     endif
>     method = varargin{end - 1};
>     extrapval  = varargin{end}; %%%%%%% KT fix %%%%%%%%%%%%%%%%%
>     nargs = nargs - 2;
>   endif
>
> Also, the documentation of interpn mentions that extrapval can be the string
> 'extrap', but that is not implement (and neither is it in matlab, so I am
> guessing this is a copy-paste mistake from interp1).
>
> Thanks
>
>   
Ok, this seems correct. Here is the fix as a changeset credited to you.

D.


-- 
David Bateman                                David.Bateman at motorola.com
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