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# parham kianian

Last seen: 11 maanden ago Active since 2017

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Write data from MATLAB to a text file
I found the solution. Have a look at Export data from MATLAB to text files. A video tutorial on youtube which explains in full d...

11 maanden ago | 0

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Question

Write data from MATLAB to a text file
I need to perform some numerical analysis in MATLAB and it will result in large volume of output. To store them I need to write ...

11 maanden ago | 1 answer | 0

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Solving third order nonlinear boundary value problem
I have a boundary value problem in this form: where alpha is a nonzero constant and boudary conditions are: f(-1) = 0 f(0) ...

12 maanden ago | 0 answers | 0

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rearrangement rows of matrices
Suppose: A = repmat((1:15)',1,5); Now I want to rearrange A such that it becomes matrix of size 5 by 15 in following form: B ...

ongeveer een jaar ago | 4 answers | 0

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How to load data from and .txt file?
I think it is much easier to use textread function. Following link describe in full detail how to use this function to import da...

meer dan een jaar ago | 0

How to import data from .txt file?
I think it is much easier to use textread function. Following link describe in full detail how to use this function to import da...

meer dan een jaar ago | 0

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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...

meer dan een jaar ago | 2 answers | 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...

meer dan een jaar ago | 0

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....

meer dan een jaar ago | 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...

meer dan een jaar ago | 1 answer | 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:

meer dan een jaar ago | 1 answer | 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...

meer dan een jaar ago | 1 answer | 0

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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 ...

meer dan een jaar ago | 2 answers | 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?

meer dan een jaar ago | 2 answers | 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...

meer dan een jaar ago | 1 answer | 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 ...

meer dan een jaar ago | 0 answers | 0

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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...

meer dan een jaar ago | 1 answer | 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 ...

meer dan een jaar ago | 1 answer | 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); ...

meer dan een jaar ago | 1 answer | 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...

meer dan een jaar ago | 0 answers | 0

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

meer dan een jaar ago | 0 answers | 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...

bijna 2 jaar ago | 0 answers | 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...

bijna 2 jaar ago | 0 answers | 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...

bijna 2 jaar ago | 0 answers | 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...

bijna 2 jaar ago | 2 answers | 0

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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 ...

bijna 2 jaar ago | 1 answer | 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...

bijna 2 jaar ago | 2 answers | 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 ...

ongeveer 2 jaar ago | 0 answers | 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 ...

ongeveer 2 jaar ago | 0 answers | 0