All Questions
Tagged with signal-processing matlab
13 questions
1
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0
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60
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Mismatch Between Frequency Response and Eigenvalue-Based Natural Frequency in MATLAB for a 5-DOF System with Frequency-Dependent Stiffness
I am working with a mechanical system that has five degrees of freedom (a composite plate), and I am trying to compute its frequency response, time-domain response, and natural frequencies.
I have ...
- 119
4
votes
1
answer
216
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Parallel 3D Discrete Cosine Transformation Implementation in Matlab
I am trying to implement 3D Discrete Cosine Transformation calculation in Matlab with parallel computing parfor. The formula of 3D Discrete Cosine Transformation is ...
- 7,224
2
votes
1
answer
128
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Applying correction to a time series in Matlab
I face a computation efficiency problem. I have a time series of a non-monotonically drifting variable, that is measurements of objects going through a machine (where the measurement is made) in a ...
- 33
5
votes
1
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849
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Matlab IIR filter implementation
I need to implement the Matlab filter(b,a,x) function in Java. Before I do this, I would like to rewrite the function in Matlab before translating into Java. So far,...
3
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2
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512
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Spectrum Analysis with Discrete Fourier Transform
Here is a simple implementation of the Discrete Fourier Transform:
myFourierTransform.m
...
- 1,194
4
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0
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117
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Neuroscientific testing
I have written the code below for the following experiment:
Subjects get simultaneous stimulation of left and right thumb and have to tell which one was stimulated "stronger" (with higher intensity, i....
- 41
4
votes
1
answer
129
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Wavelet decomposition of images
I am working on wavelet decomposition and found a formula for it and wrote it by myself for computation.
The formula is:
$$I_{LH}(i,j) = \sum_{p=1}^{N_L} \sum_{q=1}^{N_H}\ L(p)\ H(q)\ I(i+p, j+q)$$
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- 143
4
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2
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2k
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Optimizing C++ equivalent of Matlab `filter` function
Minimum working example below. The Matlab filter function filters the input data x using a rational transfer function defined by the numerator and denominator ...
- 143
4
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0
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1k
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Reading cell array of vectors with h5py
I have a data stored in .mat files, each .mat contains a cell array of vectors of length ~70. I'm trying to read these .mat files in to Python with h5py, but reading just 1000 cells takes about 7 ...
- 183
2
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0
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699
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Linear interpolation Matlab to C++
I don't have a strong mathematics/Matlab background. I would like to convert this Black level correction function from Matlab to C++. Please comment about on the code style and correctness of my ...
- 5,373
3
votes
1
answer
3k
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fftshift implementation for OpenCV
I'm trying to implement fftshift from matlab for OpenCV. Can you please review the correctness of my algorithm? Have I missed something? Also, is there a better and faster way to do it?
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- 5,373
3
votes
1
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250
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Calculate FFT from windowed time-based signal
I have a time-based signal (Raw signal) sampled at 6 MHz and need to analyze it in freq. domain.
I'm learning DSP and this is very first time I work with DSP. Could you please help to check if this ...
- 131
4
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1
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14k
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Matlab code demonstrating use of fft (Fast Fourier Transform)
I posted the following Matlab script in response to a question on Signal Processing. Here is the questions with my answer.
I am looking for comments on how to make this code more instructive for the ...
