Re: Adding unwrap to gnuplot

[Jon G. <jo...@th...>]

> Yes.
> The actual smoothing code will probably only require a few lines of C.

I've attached two patches, one that merges cleanly against cvs, and one
that works with 4.6 (minor change, but might come in useful).

I have also attached a sample data file with real phase measurements,
and a plot file that plots this data with and without unwrapping.

> The trickier part may be deciding whether or not it needs to be
> reexecuted on replot/refresh/zoom/unzoom.

The patch only implements unwrapping for datasets, and not for
continuous functions (I'm not entirely sure why it has no effect for
functions; it is not an intentional limitation from my side).

It seems to work well with zoom/unzoom/pan/replot as far as I can see.

I'd appreciate it if someone else could try this with their datasets too
and see that it's not doing anything too silly.

I could also implement a weighted unwrapper if anyone feels there's a
need for it, but I think basic unwrap will get us quite far.

Cheers,
Jon