# zein

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Question

calculate psd using fft2 for 2-D matrix

I am trying to calculate the PSD using fft2 for 2D matrix, but I am not sure how to calculate the PSD from fft2 I have used the...

mer än ett år ago | 2 answers | 0

### 2

answersunable to classify the variable 'F' in the body of the parfor-loop

Thanks for your help, I really appreciate it @Edric Ellis I have already tried to modify the lines according to your recommenda...

ungefär 2 år ago | 0

Question

unable to classify the variable 'F' in the body of the parfor-loop

I was trying to reduce the time taken by parfor and I have tried to calculate F (scatteredInterpolant() ) before the parfor loop...

ungefär 2 år ago | 2 answers | 0

### 2

answersQuestion

how to increase the number of workers to 32 for parfor loop

I am trying to increase the number of workers (cores) for parfor loop in Matalb, but after running the code the number of cores ...

ungefär 2 år ago | 1 answer | 0

### 1

answerQuestion

The variable 'counter' is perhaps intended as a reduction variable, but is actually an uninitialized temporary.

I have tried to use parfor to decrease the required time needed for the for loop. The normal for loop was working properly befor...

ungefär 2 år ago | 1 answer | 0

### 1

answerQuestion

interpolate 3D data onto 2D plane

I have variables (p,T,u,v,w) that are output for 3D block. Each point location is defined by (x,y,z) with corresponding value of...

ungefär 2 år ago | 1 answer | 0

### 1

answerQuestion

plot contours for pressure on surface points defined by z,y and z corrdinates

I want to plot the pressure contours on aerofoil surface, this surface consists of nodes lying on the surface. Each node locatio...

ungefär 2 år ago | 1 answer | 0

### 1

answerQuestion

error using symengine is generated while getting the derivative of equation of 8 degree with variable constants

I am trying to get the slope of equation (y3c=p1*xs^8 + p2*xs^7 + p3*xs^6 + p4*xs^5 + p5*xs^4 + p6*xs^3 + p7*xs^2 + p8*xs + p9),...

mer än 2 år ago | 1 answer | 0

### 1

answerQuestion

how to read files with different name using fid

I am trying to make averaging for data saved in files named:pfoil_1_var_1_562474.raw, pfoil_1_var_1_562476.raw .......pfoil_1_v...

mer än 2 år ago | 1 answer | 0

### 1

answerQuestion

how to modify the saved variable in mat file by adding extra columns without overwriting on the previously saved columns

I want to modify mat file created without overwriting the previously saved columns. I want to create an array of 12 columns and ...

nästan 3 år ago | 1 answer | 0

### 1

answerQuestion

how to read a data from text file

I want to read data from text file formatted as follows: number 7 is the number of points and they are listed in form of (x y z...

ungefär 3 år ago | 1 answer | 0

### 1

answercalculate SPL-Third octave using poctave function

%using filtbank dunction (download it from lib.) [splfiltb,fcfiltb] = filtbank(p,fs,[],'extended'); %using poctave fun pref...

ungefär 3 år ago | 1

Question

how to find the horizontal Asymptotes of fitted curve equation for a data set

I have a data for (y,vor). I have used cftool to get fitted function for the input data. I want to know how to get the the horiz...

ungefär 3 år ago | 0 answers | 0

### 0

answersQuestion

how to use curve fitting without using curve fitting toolbox?

I want to use curve fitting tool in the matlab script without opening the curve fitting toolbox. I have a data (x,u) and i want...

ungefär 3 år ago | 1 answer | 0

### 1

answerQuestion

how to take the derivative of the function saved from curve fitting tool

I want to take the derivative of the following function after extracting the curve fitted from cftool. I have saved the curve fi...

ungefär 3 år ago | 1 answer | 0

### 1

answerQuestion

How to extract the function from curve fitting tool in Matlab

I want to extract the function for my data points. I used interpolant witg linear method as indicated in the figure below. Is i...

mer än 3 år ago | 2 answers | 0

### 2

answershow to change the standard octave bands in poctave function

This is a function in Matlab called power band for calculating average power spectra over user specified frequency range functi...

mer än 3 år ago | 0

| accepted

Question

how to change the standard octave bands in poctave function

I am using pocave function to calculate intergral spectra for pressure signal over octave bands. The standard octave bands are (...

mer än 3 år ago | 1 answer | 0

### 1

answerQuestion

How can I set an axis outside the polar figure

How can i set the pola axis outside the figure and to set it to be starting from 70 not zero the original figue is shown below ...

mer än 3 år ago | 1 answer | 0

### 1

answerHow can I set an axis outside the polar figure like this photo?

how can i modify the rlabel to be starting from 70 instread of zero as i have used the same code but for my case i want the scal...

mer än 3 år ago | 0

Question

how to write Text file usiNG MATLAB

R-0 { position (0.2 1.48 0.01); pRef 2.0e-5; fftFreq 1024;...

mer än 3 år ago | 1 answer | 0

### 1

answerQuestion

calculate SPL-Third octave using poctave function

I want to calculate the sound pressure level third ooctave using poctave function I used poctave function to convert pressure d...

nästan 4 år ago | 2 answers | 0

### 2

answersQuestion

how to Coverts narrowband SPL decibel values to 1/3 octave band SPL decibel value

I want to coverts narrowband SPL decibel values to 1/3 octave band SPL decibel value, the arrowband SPL decibel values are shown...

nästan 4 år ago | 0 answers | 1

### 0

answersQuestion

how to convert pressure versus time to pressure versus frequency using fft function

I have tried to convert pressure versus time data to pressure versus frequency using FFT function This is the pressure versus...

ungefär 4 år ago | 1 answer | 0

### 1

answerQuestion

Reduce the spectrum noise of plomb function

i have pressure data with non-uniform spaced time sample as show below x-axis is the time in second and y-axis is the pressure v...

ungefär 4 år ago | 0 answers | 0

### 0

answersQuestion

how to plot pressure spectrum for a point in turbulent flow

I have pressure data for a point in turbulent flow,the data are not sampled at constant time step The data are sampled from ti...

ungefär 4 år ago | 0 answers | 0

### 0

answersQuestion

how to use interp1() function

I have tried to use interpt(1) function as i have time and pressure data. the pressure data is highly scattered it look like th...

ungefär 4 år ago | 1 answer | 0