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parham kianian


Last seen: 약 2달 전
27 2017 이후 총 참여 횟수

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difficulty to use "sin" function
Consider following: T = 0.02; %period (sec) w = 2 * pi / T; %w = 314.1593, angqular freq...

약 2달 전 | 답변 수: 2 | 0

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How to speedup very long expressions calculations?
To enhance the code you need to create a matrix and assign each variable to an array of matrix. For example variables gm0 to gm6...

약 2달 전 | 0

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How to pick random entries from the columns of a matrix such that their sum is equal to a already specified number?
I suppose you want to perform this on each column of matrix A seperately. Try this: A=[ 0.8147 0.9134; 0.9058 0.6324; 0....

약 2달 전 | 0

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MATLAB edition for Linux
Is there any matlab edition which can be installed on Linux? If yes, Is there any difference between performance of same matlab...

2달 전 | 답변 수: 1 | 0

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How can I solve the following integral equation
How can I solve the following integral equation in MATLAB numerically: where:

3달 전 | 답변 수: 1 | 0

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numerical integration in matlab
Suppose A is a column vector whose arrays are acceleration of a moving object and each array has been sampled every 0.01 sec. I...

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How to write cell array to excel file
I have a cell array whose elements have different sizes. How can I write it to an excel file? For example: a = rand(10,1); b ...

3달 전 | 답변 수: 2 | 0

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how to use function "find" over matrices
Suppose x = rand(1e5,1e5); I want to find the lowest number in each column of x without using for loop. Is it possible?

3달 전 | 답변 수: 2 | 0

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dsp.ZeroCrossingDetector: a confusing error
I am trying to employ dsp.ZeroCrossingDetector to count number of zero crossings of a signal. Consider the following: x = 0 : p...

3달 전 | 답변 수: 1 | 0

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improvement of code performance
I have to use "emd" function for 500 signals and 100 times for each of them. As a result I developed a code like below: for ii ...

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A 2D plot with different colors for each point
Suppose time is a column vector of length Lt, freq and amp are matrces of size Lt * n. I want to plot a each column of freq agai...

3달 전 | 답변 수: 1 | 0

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How to add a 2D line to a surf plot
The following figure shows the x-y view of a surf plot. How can I add a 2D line to this type of plots. For example I have added ...

4달 전 | 답변 수: 1 | 0

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Problem in using asin function
Consider the followingj t = 0 : 0.02 : 10; nu = (t-5).^2 + 2; omega = 2*pi*nu;%as a polynomial of degree 2 f = sin(omega); ...

4달 전 | 답변 수: 1 | 0

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continuous wavelet transform for a specified frequency range
Consider column vector h as a one dimensional signal with length Lh. I want to evaluate the continuous wavelet transform of sig...

4달 전 | 답변 수: 0 | 0

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Built in function for S-transform
Does MATLAB has any built in function for S-transform?

4달 전 | 답변 수: 0 | 0

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spectrogram of matrix in MATLAB
I hvae a matrix F whose arrays are positive numbers with the size of 8000 * 1000. I want to plot a spectrogram for F such that...

4달 전 | 답변 수: 0 | 0

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Negative instantanous frequency values in outputs of hht function
I am using hht function of MATLAB to evaluate instantanous frequency of a signal sig (a column vector of real numbers) using the...

4달 전 | 답변 수: 0 | 0

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Non-stationary signal decomposition
suppose f(t) is a non-stationary signal which can be expressed as follow: f(t) = A1(t)*sin(w1*t) + A2*sin(w2*t) + ... + An(t)s...

5달 전 | 답변 수: 0 | 0

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convolution of two function
I have two functions as below: t = 0 : pi/180 : pi; f = exp(-t/3) .* (sin(2*t) + 2*sin(4*t) + 0.4*sin(2*t).*sin(40*t)); h = 1...

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selection of n disticnt vector
I have a vector A like A = 1 : 10 I want to make two distinc vector of length 3 such thta no array be in common between these ...

6달 전 | 답변 수: 1 | 0

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How to sum columns of a matrix in MATLAB in specified number of columns?
I have a matrix A of size 2500*500. I want to sum each 10 columns and get the result as a matrix B of size 2500*50. that is, the...

6달 전 | 답변 수: 2 | 0

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images in MATLAB help
Dear Frieds, I am using MATLAB R2018a on windows 10 operting system. But,whenever I search somthing in MATLAB help, the images ...

8달 전 | 답변 수: 0 | 0

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Over-determined system
Dear Friends, I want to solve an over-determined system in the form of max(abs(A*x)) = B; size(A) = n by m size(x) = m by 1 ...

8달 전 | 답변 수: 0 | 0

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Over-determined system of equations
Dear friends, I need to solve a system of over-determined equations as follow: max(abs(A11*x1 + A12*x2 + ... + A1m*xm)) = B1 ...

8달 전 | 답변 수: 0 | 0

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Is there any built in function in MATLAB to compute hilbert huang transform of signal?
thanks Mr KALYAN ACHARJYA. function hilbert just does hilbert transform, but before transformation it is required to decompose...

2년 이상 전 | 0

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Is there any built in function in MATLAB to compute hilbert huang transform of signal?
Dear all I need to compute Hilbert Huang transform of a signal and apply some modification to it in frequency domain. finally e...

2년 이상 전 | 답변 수: 2 | 0

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how to reconstruc a signal from its modified discrete fourier transform?
Dear all I need to modify the discrete Fourier transform coefficients and then inverse it from frequency domain to time domain....

2년 이상 전 | 답변 수: 1 | 0

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