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Re: I need a bit of help....Convol and functions [message #50533 is a reply to message #50393]

Wed, 04 October 2006 05:59

D.Kochman@gmail.com is currently offline

D.Kochman@gmail.com
Messages: 7
Registered: October 2006

Junior Member

> Yes, func() needs to create an array for CONVOL() to convolve. However,
> sumex should already be an array, in order for this code to work as
> intended, and this code does nothing to change any aspect of sumex. I'm
> not sure I understand what you mean by the comment "but its a
> function".

Thanks for the help, slowly but surely I'm starting to get it. What I
meant by "but its a function" is I just don't see how sumex is an
array. If I were to put

sumex = X

that to me makes sumex a function, namely, f(x)=x

if it was [(1,1),(2,2),(3,3)....] that to me is an array.

I know it has to be an array though.....I'll just stare at it some
more.

The reason I ask is related to my original question, and that is pretty
much that I have to redefine sumex, with my original monstrosity of an
equation. Which approximately is (cos(x)*exp(-x)) conv exp(-x/t). I
wanted to know how the original author of the software made sumex an
array, so I can apply the same principles to my equations and not do
the convolution analytically, but rather discretely. Its tough
jumping into a new language with the source code having no commenting,
and trying to pick it all apart.

I will re look at the documentation for convolve, and twiddle around
with things to see how they work, and how I can manipulate them I can
do.

As always, I'm grateful for whatever help I can get here. This is
going to be a long year of IDL learning, and I did myself the necessary
disservice of jumping in on the deep-end. =P Its been a long while
too since I did any programming (8 years or so), so I'm relearning all
the jargon. Slowly but surely its all coming back. Nothing really has
the power to make me feel like such an idiot as programming. However,
in the end when everything works its a very satisfying feeling.

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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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