comp.lang.idl-pvwave archive: archive » Approximate convolution

Home » Public Forums » archive » Approximate convolution - for loop problem

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Approximate convolution - for loop problem [message #64417]

Sun, 21 December 2008 09:32

samuel.leach
Messages: 1
Registered: December 2008

Junior Member

Hello everyone, I'm trying to execute a 1-d convolution of an array,
signal.

Using an analytic approximation, obtaining the convolved bolometer
signal, bolo_signal, at time step ii, is given by the following:

nsamp=n_elements(signal)
const1 = exp(-tsamp/taubolo)
const2 = 1.-const1

bolo_signal = const2*signal
for ii= 1L,nsamp-1L do begin
bolo_signal[ii] += const1*bolo_signal[ii-1]
endfor

where tsamp and taubolo are scalars. Is there any way to avoid the for
loop in this case? The hope is to speed up the execution.

Many thanks for your help

Sam Leach

Report message to a moderator

[Message index]

		Approximate convolution - for loop problem By: samuel.leach on Sun, 21 December 2008 09:32
		Re: Approximate convolution - for loop problem By: Jeremy Bailin on Wed, 24 December 2008 13:20
		Re: Approximate convolution - for loop problem By: David Gell on Fri, 02 January 2009 11:12

Previous Topic:	Re: scatter plots make large PostScript files
Next Topic:	Running IDL remotely - problems with xwindows

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 13:05:50 PDT 2025

Total time taken to generate the page: 0.32510 seconds