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Re: I need a bit of help....Convol and functions [message #50394 is a reply to message #50393]

Tue, 03 October 2006 16:04

news.qwest.net
Messages: 137
Registered: September 2005

Senior Member

<D.Kochman@gmail.com> wrote in message
news:1159908159.612660.56200@i3g2000cwc.googlegroups.com...

> consum = convol([blank,sumex],sconfun,total(sconfun),CENTER=0)

> So my big question is what is going on in convol? If I'm guessing
> correctly it seems like this is creating an array [blank,sumex] in
> essence to force an array upon sumex - but its a function.

[blank,sumex] is a one dimensional array (assuming X is) where the
actual "time series" (sumex) is being zero padded for 1024 points.

sconfun is the kernel

total(sconfun) is a scaling factor, ie the entire result gets divided by
this number

One big thing you should know is that convol() can do either a convolution,
or a correlation.
If the keyword "center" is set to one it does the correlation, and if it is
zero
then you get a convolution (or vice versa) and there may be the need to
reverse
the kernel beforehand.

Cheers,
bob

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[Message index]

		Re: I need a bit of help....Convol and functions By: James Kuyper on Tue, 03 October 2006 16:17
		Re: I need a bit of help....Convol and functions By: news.qwest.net on Tue, 03 October 2006 16:04
		Re: I need a bit of help....Convol and functions By: D.Kochman@gmail.com on Tue, 03 October 2006 13:42
		Re: I need a bit of help....Convol and functions By: JD Smith on Mon, 02 October 2006 14:59
		Re: I need a bit of help....Convol and functions By: James Kuyper on Mon, 02 October 2006 13:00
		Re: I need a bit of help....Convol and functions By: D.Kochman@gmail.com on Mon, 02 October 2006 11:36
		Re: I need a bit of help....Convol and functions By: JD Smith on Mon, 02 October 2006 10:14
		Re: I need a bit of help....Convol and functions By: James Kuyper on Mon, 02 October 2006 07:58
		Re: I need a bit of help....Convol and functions By: D.Kochman@gmail.com on Wed, 04 October 2006 05:59

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