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beamforming a signal with random noise
Hi zozo, It seems that you are using half wavelength spacing. If that's the case, your steering vector should be ad = e...

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beamforming a signal with random noise
Is your signal sin(20*pi/180) and also impinging from 20 degrees? I just want to make sure this is what you want. It looks like ...

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delay and sum beamforming(in frequency domain)
Hi Zoro, What you have so far is calculating the delays between the elements. The next steps will be (1) simulate the rece...

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plot3
Hi Lisa, I don't think plot3 is appropriate for your purpose. I think you probably better off using |image| or |imagesc|. ...

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Error in creating Class
You can try temp = struct2cell(theStruct); ncitem(temp{:});

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To apply Gaussian in histogram?
If you want to generate random number whose histogram is Gaussian shaped, check |randn|. Otherwise, could you clarify what you m...

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problem printing double format values
You missed a t, it's |fprintf|, not |fprinf|

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How to freeze a random sample
There are some side effects using the syntax Walter mentioned. Basically MATLAB changes the random number generator silently beh...

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find position of a element in a matrix
You can use |find| find(A<7,1,'last') HTH

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Missing Statistics Toolbox
Hi Carl, Does rehash toolboxreset rehash toolboxcache help? Also, if you do ver Do you see Statistics To...

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downsample
There are several possibilities. You can use either |upfirdn| or design the filter using |fdesign.decimator| and then filter you...

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mutiplying a role of number and seach or max and min value
You can use |kron| to do what you want. kron(a,b) doc kron As to finding out what |a| and |b| is, given the regular...

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matrix reshaping
You can try B = A.'; B = B(:).';

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Use a loop to load .dat files (with matrices) and manipulate them
If you use |dir|, it returns a struct. In your case, you should do load(D(i).name) instead. HTH

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function call
You can add it to your path. doc addpath

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how to do implement difference equation in matlab
You are on the right track in general, but there are two things I want to point out: # If your |x| is |2*n|, then |x(0)| is 0...

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how to do implement difference equation in matlab
I think your |b| is incorrect, it should be |[1 1]| instead. To accommodate for the initial value of |y| and |x|, you need to tr...

plus de 14 ans il y a | 2

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Filter Question - FIR and IRR
The approach looks fine. I assume your sampling frequency is 140 kHz? If that's the case, I think you are just missing an |r_s| ...

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Need help for cross checking of eigen Vector
The eigenvectors are not unique, they can differ by a scale. Based on MATLAB's answer, your eigenvector for the eigenvalue of 5 ...

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Plot axis limits
You can give following command a try axis tight If you want more control, you can use |axis| command to control the limits ...

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Please help me understand my homework
It seems that you never compute your |H(k)|. So once |k>1|, there is no value for |H(k)|.

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Pole Zero Plot of Transfer Fucntion H(z)
You can use |zplane|, you can specify either the zero/pole directly or the coefficients. For example, using your equation, you c...

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read two different tracks in matlab
I assume this is similar to a stereo signal. If that's the case, then you can still use |wavread| to read in the file. [y,...

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signals denoising
Hi Amani, You can try to look at the following demo and doc if you have Wavelet Toolbox doc wden http://www.mathworks...

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Signal Processing - Cross-Correlation to obtain Lag times - further question related to previous answer
Hi Trudy, The answer below should be helpful. http://www.mathworks.com/matlabcentral/answers/19599-time-delay-between-two-...

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help on if statement
You can vectorize this in one command: idx = 1:31; find( (X4(idx,1)>X4(idx,2))&(X4(idx,2)>X4(idx,3))&(X4(idx,3)>X4(idx,4)...

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plot
There are several things you can do, the simplest is probably plot(t,xt(1:length(t)),t,yt(1:length(t))) This assumes that yo...

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How to see freq response of a wave file
Let's say you have a wav file called foo.wav, you can use spectrum object to see its spectrum [y,fs] = wavread('foo.wav'); ...

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how to do wavwrite on this mat file
To write a wave file, you need at least the signal and the sampling frequency. From you example, it seems you can just do w...

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2nd interpolation of irregular data
Hi Scott, You can use |TriScatteredInterp| to do this. doc TriScatteredInterp HTH

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