Re: Why is NaN used as extrapolation value?

[David Bateman]

Søren Hauberg wrote:
> Hi,
>   The current interpolation functions all use NaN as extrapolation
> value. I know that Matlab does this, which (I guess) is why we do it.
> But since we have NA why isn't that used? Using NA as default
> extrapolation value should be Matlab compatible (right?) and would
> IMHO make more sense.
>
> Søren
>
> P.S. Since I brought it up I'll be happy to send patches if requested
> (they should be damn easy to produce...)
>
Yes I believe the only reason is compatibility. However I wouldn't
change it. The user can always specify the extrapval if they want it to
be NA, and changing it will only cause additional bug reports of matlab
incompatibility.

D.

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