Tim 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.
As I was teached in this newsgroup just a few weeks ago, "plot '<
myscript'"
does just that. So "plot '< smooth mydata.dat'" is probably what you want.
Lewin
|
