3.3 | 7 ratings Rate this file 56 downloads (last 30 days) File Size: 1.54 KB File ID: #3194

func_coherence.m

26 Mar 2003 (Updated 01 Jul 2009)

This m-function computes coherence and phase at the same time.

File Information
Description	This very simple m-function computes cross spectrum, coherence and phase at the same time. The input parameters are equivalent to pwelch.n or csd.m in MATLAB and use csd.m in the singal toolbox. It's very simple but useful for engineers.
Required Products	Signal Processing Toolbox
MATLAB release	MATLAB 6.5 (R13)
Zip File Content
Other Files	func_coherence.m, license.txt

Tags for This File
Everyone's Tags	coherence, cross spectrum(2), phase, signal processing, spectral analysis
Tags I've Applied
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Comments and Ratings (7)
02 Apr 2004	A Zaki	Good program..
16 Apr 2005	Philip Orton	I agree. Simple, but just what I was looking for, since I wasn't aware of how to compute phase. A minor improvement would be to allow the user to ignore the filt and n_overlap inputs, just as one can do with the csd.m function.
02 Aug 2005	Vitaliy Marchenko	check it with two aboslutely identical sinusoidal waves of any frequenciy (let say) - 50 hz ... - and you will be surprized... - it doesn't work as Matlab standart function - 'cohere' or 'mscohere'(for version 7.0)
22 Jun 2006	Jon Fram	I got it to produce the same output as mscohere by replacing csd with cpsd. I also wasn't clear how to calculate phase. func_coherence.m makes that clear to me. Thanks.
05 Oct 2006	j p
10 Oct 2006	jan pospisil
03 Jun 2007	k walker	This is indeed nice, but it would have been better if it showed exactly how cpd's were calculated. Curse matlab for hiding such details.

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Updates
01 Jul 2009	BSD license has been applied.

Tag Activity for this File
Tag	Applied By	Date/Time
spectral analysis	Nobuhito Mori	22 Oct 2008 06:58:55
cross spectrum	Nobuhito Mori	22 Oct 2008 06:58:55
coherence	Nobuhito Mori	22 Oct 2008 06:58:55
phase	Nobuhito Mori	22 Oct 2008 06:58:55
signal processing	Nobuhito Mori	22 Oct 2008 06:58:56
cross spectrum	bagi	20 Apr 2009 08:28:26

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