Re: Question about tutorial in 1D Gaussian Filter

[air_jlin(at)yahoo.com (Johnny Lin)]

hi Cora,


coraluk@hkpc.org (Cora) wrote in message
news:<b19810c5.0107292330.37dd66aa@posting.google.com>...
> I want to use a 1D Gaussian Filter to fit a curve. After visiting the
> tutorial about 1D Curve fitting in IDL, I still found some problems in
> the function gauss1. Following are the questions:
> 
> 1) What is the return of "size(x)"?
> 
> 2) What is meant by "!dpi"?
> 
> 
> Yours,
> Cora
>
SIZE returns information (e.g. array size, type, etc.) about the variable
x.  !dpi is a system variable that contains the double precision value of
pi.  for more info., both are described in more detail on the online help.

best,
-Johnny


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Johnny Lin
CIRES, University of Colorado
Work Phone:  (303) 735-1636
Web:  http://cires.colorado.edu/~johnny/
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