Re: [Help-gsl] bilinear interpolation

[Daniel J Farrell]

Hello,

I was looking at implementing bilinear interpolation as I needed it  
for something I was working on. The actual math is quite easy to  
implement in code (http://en.wikipedia.org/wiki/ 
Bilinear_interpolation). However, as I don't have any developer level  
knowledge of GSL (I'm just a user), I would find the trick bit coding  
in such a way to make in consistent with GSL style.

Maybe one of the developers here could describe what the interface  
would look like and others could supply the implementation?

My guess would be,

new file... gsl_interp2d.h

gsl_interp2d * gsl_interp2d_alloc(const gsl_interp2d_type * T, size_t  
size_x, size_t size_y);

int gsl_interp2d_init (gsl_interp2d * interp, const double xa[], const  
double ya[], const double za[][], size_t size_x, size_t size_y);

void gsl_interp2d_free (gsl_interp2d * interp);

etc...

The Evaluation of Interpolating Functions might need some knowledge of  
the actual implementation so I will stop there. What do you think?

Dan.





On 25 Jan 2008, at 08:09, Giampaolo Bellini wrote:

> Hi...
>
> does gsl supports bilinear interpolation ?
>
> I found no info on docs & mailing lists about it.
>
> thanks in advance
>
>     Giampaolo
>
>
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