On May 30, 1:13=A0am, Tim <tim...@[EMAIL PROTECTED]
> wrote:
> 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.
you need to look at gnuplot help command and read the plot topic.
plot '-' is a special filename that takes input from stdin.
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