Hi Randall, I tried out your QuickBasic program using the compiled program and running from the source code. Changing the file name is not necessary, so long as you enter the complete name. You neglected to tell users what keys to use to re-run or terminate the program. Cheers, Bob ~~~~~~~~~~Original Message~~~~~~~~~~~ Subject: Re: Digest from 07/17/2007 00:01:20 From: Randall Peters PETERS_RD@.......... Date: Thu, 19 Jul 2007 11:52:05 -0400 Because of the recent interest in FFT's, I have posted some files on my webpage at _http://physics.mercer.edu/hpage/psn/psn.html_ (http://physics.mercer.edu/hpage/psn/psn.html) The pdf's should help those of you who have been wondering how the Fourier transform works and why the Cooley-Tukey form (Fast version) is SO MUCH better than the discrete FT (for which there is much needless, repetitive calculations). The executable can be downloaded (I promise that it is safe to use) and some data files have been posted to the site so that you can run test cases. test and test 2 are pure sine signals, one with a period of 17 s and the other 1000 s. The 0704 file is a record of the Solomon Islands EQ recorded wtih Larry Cochrane's VolksMeter. Before you can use the files you must rename your saved version (*.txt) to *.dat. This suffix must be typed in along with the filename when you are prompted for the input file. ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tourHi Randall,I tried out your QuickBasic program using the compiled program a= nd=20 running from the source code. Changing the file name is not necessary, so lo= ng=20 as you enter the complete name.You neglected to tell users what keys to use to re-run or termin= ate=20 the program.Cheers,Bob~~~~~~~~~~Original Message~~~~~~~~~~~Subject: Re: Digest from 07/17/2007 00:01:20
From: Randall Peters=20 PETERS_RD@..........
Date: Thu, 19 Jul 2007 11:52:05 -0400Because of the recent interest in FFT's, I have posted some files= on=20 my webpage at
http://physics.mercer.= edu/hpage/psn/psn.html
=20 The pdf's should help those of you who have been wondering how the Fourier=20 transform works and why the Cooley-Tukey form (Fast version)
is SO MUCH=20 better than the discrete FT (for which there is much needless, repetitive=20 calculations).
The executable can be downloaded (I promise that it= is=20 safe to use) and some data files have been posted to the site so that you ca= n=20 run test cases. test and test 2 are pure sine signals, one with a peri= od=20 of 17 s and the other 1000 s. The 0704 file is a record of the Solomon= =20 Islands EQ recorded wtih Larry Cochrane's VolksMeter. Before you can u= se=20 the files you must rename your saved version (*.txt) to *.dat. This su= ffix=20 must be typed in along with the filename when you are prompted for the input= =20 file.=
Get a sneak p= eek of the all-new AOL.com.