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Jingtao


Last seen: 23 days ago |  Active since 2020

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How can I fix the warning and the error in parfor?
a = linspace(1,100,100); parfor i=1:10 for j=1:10 k = (i-1)*10+j; b = a(k)+5; %// warning c(k)...

23 days ago | 1 answer | 0

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answer

Question


rotate polar angle by an arbitrary angle
I got a polar angle map THETA0 from running the snippet below. N = 1024; x0 = linspace(-N/2, N/2, N); y0 = x0; [X0,Y0] = ...

10 months ago | 1 answer | 0

1

answer

Question


Create a matrix representing the gradual-width Fermat spiral slit mask
I would like to create a N*N matrix T = zeros(N) to represent the gradual-width Fermat spiral mask given by where rho and the...

10 months ago | 0 answers | 0

0

answers

Question


Retrieve phase from a time-varying cosine signal
I got two experimental time-domain signals (sampling length of N=13001, sampling frequency of Fs=4000 Hz). By curve fitting, I f...

11 months ago | 1 answer | 0

1

answer

Question


Curve fitting using custom equation
I got a costum equation in the form of OPCrtr = @(r) 1.5186e-08.*integral(5.9122e-6.*A.*exp(-5e-7.*a.^2).*(1-exp(-alpha.*10.*a...

12 months ago | 1 answer | 0

1

answer

Question


How to get data from a circular line on a 2D array in the anti-clockwise direction?
I need to extract data from a circular line (with defined radius and origin) on a 2D array (captured by a CCD with 1024*1024 pix...

1 year ago | 1 answer | 0

1

answer

Question


time-frequency analysis of multi-component chirp
hi, I am working on time-frequency analysis of multi-component chirp. I tried to use 'wsst' to separate the chirps but failed (...

1 year ago | 1 answer | 0

1

answer

Question


How to project a 2D image to another plane?
Dear all, I would like to project an image with 2D Gaussian intensity distribution to another plane, which is rotated by an ang...

4 years ago | 1 answer | 0

1

answer