On May 28, 6:53 pm, goog...@[EMAIL PROTECTED]
wrote:
> Tim wrote:
> > Hi All,
>
> > I've looked in the do***entation and online, and I can't seem to find
> > any way to do Gaussian smoothing.
>
> > Normally, I'd simply write a function for it, but the problem is that
> > this type of smoothing of course requires as many dimensions as there
> > are data points. That is, each point of data is scaled as a function
> > of the height of all other points. Since (I think) GNUPLOT reads one
> > line at a time from data files, I don't know if it's possible.
>
> > That said, GNUPLOT is so powerful, I can't see it not being able to do
> > something like this. Could somebody please point me in the right
> > direction?
>
> > Cheers,
>
> > Tim.
>
> Gnuplot is primarily a plotting tool . This is probably the sort of
> data processing task you could do externally , either before calling
> gnuplot of by using gnuplot's system() command.
>
> Having said that someone just posted a patch to do something like this
> to gnuplot-beta mailing list. You may like to get current cvs
> gnuplot , add that patch and test it.
>
> BTW if you want to write some code you can do gaussian smoothing by
> applying a finite kernel filter. In practice this is just a few values
> depending on the width of your gaussian filter, not the all your data
> points.
I don't really want to keep a lot of extra numbers around. These files
will be somewhat large and numerous, so it could become confusing very
fast.
If I write a program which outputs the smoothed data to stdout, could
I somehow run it within gnuplot and directly read the output? Not that
it's a big issue to write to a tem****ary file, but I would somehow
like something cleaner.
Thank you by the way, and I will definitely use a truncated (finite)
kernel.
Best regards,
Tim.
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