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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...

más de 14 años hace | 0

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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 ...

más de 14 años hace | 0

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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...

más de 14 años hace | 1

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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|. ...

más de 14 años hace | 0

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

más de 14 años hace | 0

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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...

más de 14 años hace | 0

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

más de 14 años hace | 0

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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...

más de 14 años hace | 0

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

más de 14 años hace | 0

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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...

más de 14 años hace | 0

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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...

más de 14 años hace | 0

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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...

más de 14 años hace | 0

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

más de 14 años hace | 0

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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

más de 14 años hace | 0

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

más de 14 años hace | 0

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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...

más de 14 años hace | 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...

más de 14 años hace | 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| ...

más de 14 años hace | 0

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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 ...

más de 14 años hace | 1

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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 ...

más de 14 años hace | 0

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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)|.

más de 14 años hace | 0

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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...

más de 14 años hace | 0

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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,...

más de 14 años hace | 0

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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...

más de 14 años hace | 1

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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-...

más de 14 años hace | 0

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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)...

más de 14 años hace | 1

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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...

más de 14 años hace | 0

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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'); ...

más de 14 años hace | 0

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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...

más de 14 años hace | 0

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

más de 14 años hace | 0