Nessuna licenza
Spectrum using Welch's method
USAGE:
q = specwelch(x,dt,w,Nsg,pnv,Wn,ftype,n)
[psdf,f] = specwelch(x,dt,w,Nsg,pnv,Wn,ftype,n)
[psdf,conf,f] = specwelch(x,dt,w,Nsg,pnv,Wn,ftype,n)
DESCRIPTION:
Calculates the spectrum for x
using Welch's method.
The confidence intervals are calculated
using the inverse of chi-square CDF.
Also includes a filtering option using the
butterworth filter to see the effect of the
filter on the spectrum
INPUT VARIABLES:
x - Time series, [vector]
dt - Sampling Rate, [scalar]
win - Window, one of:
'hanning', 'hamming', 'boxcar'
Nsg - Number of Segments (>=1)
pnv - Percentage Noverlap of Segments (0-100)
Nb - Band Averaging, number of bands to average
Wn - Cut-Off frequencies, used for filtering
ftype - Type of filter, 'high', 'low' or 'stop'
n - Number of coefficients to use in
the Butterworth filter
OUTPUT VARIABLES:
q - structure with the following fields:
xp - detrended x
f = Frequencies
T - Periods
m - Magnitude
a - Amplitude
s - Power spectrum, Sxx(win), [Power]
psdw - Power Spectral Density, Pxx(win), [Power/rad/sample]
psdf - Power Spectral Density, Pxx(f), [Power/sample-freq]
psdT - Power Spectral Density, Pxx(T), [Power*time-unit]
conf - Upper and Lower Confidence Interval multiplication
factors using chi-squared approach
Cita come
Alex Sanchez (2024). specwelch (https://www.mathworks.com/matlabcentral/fileexchange/11690-specwelch), MATLAB Central File Exchange. Recuperato .
Compatibilità della release di MATLAB
Compatibilità della piattaforma
Windows macOS LinuxCategorie
Tag
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!Scopri Live Editor
Crea script con codice, output e testo formattato in un unico documento eseguibile.
Versione | Pubblicato | Note della release | |
---|---|---|---|
1.0.0.0 |