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Wavelet display problem - marked difference in frequency content between 'contour' and 'imagec'
Unfortunately I don't have a lot of time at the moment to look into this, but how about just using surf() WaveT='morl'; ...

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Calculating autocorrelation on time series data
If you have the Signal Processing Toolbox, you can use xcorr() to find the autocorrelation sequence. If you have the Economet...

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What is the difference between the complex morlet waveform and the morlet wavelet transformation (cwt)?
Complex-valued wavelets are useful in cases where you want to analyze phase as well as magnitude. Additionally, complex-valu...

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Help using idwt3 - high and low pass filters
dwt3 returns a structure array. The 3-D wavelet coefficients are in the dec field and are ordered as explained in the documenta...

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Proper wavelet scaling / restricted frequency analysis
Yes, it is possible, but you have to remember that the CWT is not as localized in frequency as the Fourier basis, so you have to...

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Why does line style in plot change?
That is because of the nature of your data. Your x-values are not equally spaced and they are not monotonic. Your x-values are b...

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Why does line style in plot change?
I do not get that behavior: x = 1:100; y = randn(100,1); plot(x,y,'--','LineWidth',4,'color',[.5 .5 .5]); Ca...

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Gaussian smoothing of time series
You do not tell us how many samples represents 10 days in your t variable. That is an important piece of missing information. He...

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how to use k means
Jose-Luis has a very good suggestion. You can use kmeans() as follows: I = imread('cameraman.tif'); points = detect...

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How to cascade two IIR filters? Is the Operation Same as Convolution?
For IIR filters, you don't have the impulse response because that is infinite. I mean you can write it as an infinite series, bu...

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I can correct the error. Help me please!!
The problem is the character you have in for "^", not sure where you entered that in from, but copy and paste the below directly...

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How can I calculate respiration rate from a respiration signal based on specific onsets?
You should be able to just do that with a frequency-domain analysis by either computing the DFT (via FFT), or using a nonparamet...

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I have a question on plotting a specific part of data from a larger section,
It looks like your sampling frequency is 20 kHz I'll just create a noise signal as an example fs = 2e4; D10 = randn...

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Subscript indices must either be real positive integers or logicals.pls help me with dis error
You have to tell us what the sizes are of the variables in rm=rm(winSize/2:length(rm)-winSize/2); put a breakpoint in the...

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Does anyone know anything about the two functions "dct2e" and "idct2e"?Where can I find their code?
This is a possibility: <http://www.mathworks.com/matlabcentral/fileexchange/21139-circular-convolution-using-dct-and-dst/all_...

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How to find the position(index) of a floating point number in matrix?
You can use a tolerance to find the nearest floating point number. If you make the tolerance small enough, it should work. ...

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function slope ??? Undefined function or method
slope() is not a Mathworks function, but you can use polyfit() to fit a first-order polynomial to some data and get the slope by...

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i want frequency domain spectrum of an audio file and i want to set frequency range of about 3 kHz. it is showing range upto 10 kHz. how can i modify it?
You have a couple things here. For one, you are creating a frequency vector with 0 frequency at the center. Do you really need t...

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Where are stored values of discrete wavelet functions?
You can use wfilters() to find the values of the scaling and wavelet filters For an orthogonal wavelet, the decomposition and...

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How do I know if the finddelay function is significant?
It is not true that you will get back a delay of zero for cases when the signals are not significantly correlated at any lag. ...

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Anyone know what's up with Urs (us) Schwartz?
It looks like Urs Schwarz is still an active neuroscience researcher at Neuroscience Center Zurich so that is good news. His co...

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I want to plot frequency vs time from the sound data(i.e. column data). I am not able to do it. Please please help. the specgramdemo function when run give at what time what frequency is present, but i want that it should return mtrx frequency vs tim
spectrogram returns matrices containing the complex-valued short-time Fourier transform and the short-time periodograms. See ...

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How do I extract the rows of a matrix when I have the row numbers stored in another vector?
A = randi([0 4],102,3); idx = find(A(:,1) == 1); B = A(idx,:); Another way: B = A(A(:,1)==1,:);

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anova2 is not working properly
Can you please provide your MATLAB version number? I am able to produce exactly the Anova table shown in the MATLAB documentatio...

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Sidelobe suppression using Windowing
There are many examples of this in the Signal Processing Toolbox documentation. Just multiply the signal vector by your windo...

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How do I know if the finddelay function is significant?
If the signals are equal length, then why not use xcorr() with the 'coeff' option? Then the cross-correlation will lie in the...

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Values closest to a number
It looks like you are looking for the closest numbers where one is below 7 and one is above. If that is the case. A = [2 ...

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what is primal ELS in lifting scheme?what does this commands do
This is essentially the same question you asked here and I answered: <http://www.mathworks.com/matlabcentral/answers/73763-ho...

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How to take out a specific part of signal for processing?
For example (I'll just create a noise signal to demonstrate) x = randn(3e4,1); xnew = x(1e4:2e4); xnew is the signal co...

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How can I design Adaptive Filter by using LMS algorithm??
Do you have the DSP System Toolbox? If so, see <https://www.mathworks.com/help/dsp/ref/dsp.lmsfilterclass.html> or <ht...

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