Answered
Reference level P0 in psd() logarithm?
You're welcome Bob, just to reiterate what I stated above, if you try the following: x = randn(1000,1); [a,e] = aryule(x...

14 years ago | 0

Answered
Reference level P0 in psd() logarithm?
Hi Bob, In PSD estimates, you can take this to be 1. The use of the logarithm in PSD calculations is different than the use of ...

14 years ago | 1

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Answered
Function file not behaving
Don't name your output variable the same as the function. Because after you output BPE once, then it's a variable in the workspa...

14 years ago | 0

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Answered
computing symlet wavelet
Hi Claire, The MATLAB Wavelet Toolbox has the scaling filters for a number of the symlet (Daubechies' least-asymmetric) filters...

14 years ago | 0

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Answered
corrcoef command
Yes, the data can have NaNs, but you then have to use the 'rows' input and set one of the values to: _Either 'all' (default) ...

14 years ago | 0

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ARMA Spectral Estimation in MATLAB?
Hi Bob, You can use armax to estimate the parameters of an ARMA model, by just specifying the 'na' and 'nc' inputs to the model....

14 years ago | 0

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Answered
How is adjrsquare calculated?
Hi Scott, it is 1-(1-Rsquare)*(number_of_observations-1)/degs_of_freedom You can find the basic description here: <http://en....

14 years ago | 0

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Answered
Spectrum.music VS pmusic
Hi Bob, the major difference is that one is a function pmusic() and the other is an object. It is an "older" type MATLAB object,...

14 years ago | 0

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Answered
Cochlear implant
You want to bandpass filter of course, but then the zero crossing detector finds the dominant oscillation by noting that there a...

14 years ago | 0

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noise in system generator
I agree with Walter that is not a MATLAB/Simulink question. Additive WGN is a good noise model because in a wide variety of con...

14 years ago | 0

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"Approximation" and "detail " in wavelet
The approximation, or scaling, coefficients are the lowpass representation of the signal and the details are the wavelet coeffic...

14 years ago | 0

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Cochlear implant
Hi, You can read a nice introduction to the continuous interleaved sampling approach here <http://www.utdallas.edu/~loizou/...

14 years ago | 1

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sampling
Your data is currently sampled at at 10 Hz. Just redefine your t vector to use steps of 1/5e4. For example: dt = 1/5e4; x =...

14 years ago | 0

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Answered
span of a vector
Hi Sara, I'm not sure what A has to do with the way you have phrased your question. The span of b is simply all scalar multiples...

14 years ago | 0

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Answered
FFT of an Image
An MRI image is already an image of 2-D Fourier magnitudes of the underlying K-space data.

14 years ago | 1

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Answered
lattice filters
Hi, Yes, it does. As you suggest, x is the input signal and d is the desired signal.

14 years ago | 0

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noise reduction in fir filter
Hi Debalina, If you want to use the window method for a bandpass filter, you can do the following (of course you need to modify ...

14 years ago | 0

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Create text string vector
Hi Stefanie, How about using a cell array. A={'C:\Data\file1.txt', 'C:\Data\file2.txt', 'C:\Data\file3.txt', ...

14 years ago | 1

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speech recogniton using matlab
Have you seen this demo? <http://www.mathworks.com/company/newsletters/digest/2010/jan/word-recognition-system-matlab.html>

14 years ago | 1

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FRF magnitude calculation
Hi Felix, you should form complex numbers in MATLAB from the first and second columns and take the magnitude squared (if it is a...

14 years ago | 0

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Answered
Image compression Ezw code wanted!
Hi Nizar, The Wavelet Toolbox has EZW has an option in wcompress. That code is visible.

14 years ago | 1

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Answered
matlab code to c
See the MATLAB Coder product page <http://www.mathworks.com/products/matlab-coder/>

14 years ago | 1

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I have license of Econometrics Toolbox, but I can not use the function price2ret, anyone can help me out?
Can you say which version of MATLAB you are using? Are you using MATLAB in a networked configuration? If you enter: license(...

14 years ago | 0

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Answered
How to do padding of values in array?
x = randn(1028,1); x = [x ; median(x).*ones(1056-1028,1)];

14 years ago | 0

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radar using matlab
Hi Jithin, If you take a look at the online documentation for the Phased Array System Toolbox, I think you will see a lot of dem...

14 years ago | 0

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How to evaluate duration of scaled wavelet?
Hi Anton, Since you are using wavedec(), I assume you are working with discrete wavelet and scaling filters. What I'm going to s...

14 years ago | 0

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Answered
wigner distribution
Hi Sravantej, Please see <http://tftb.nongnu.org/> The time-frequency toolbox by Professor Flandrin includes utilities ...

14 years ago | 1

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Does MATLAB implement the dual tree wavelet transform to get the co-efficients of an image?
Hi Pat, the dual tree wavelet transform is not currently supported in the MathWorks' Wavelet Toolbox, but Professor Ivan Selesni...

14 years ago | 0

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Answered
xcorr zero lag
Hi Diego, Why doesn't this work? [c,lags] = xcorr(randn(1000,1),rand(1000,1),0,'coeff'); This gives you exactly what you hav...

14 years ago | 0

Answered
ARX Model
Hi Alexis, an ARX model consists of the current and past values of an input up to some time step plus an additive noise componen...

14 years ago | 0

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