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elis02


Last seen: 1 year ago |  Active since 2017

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Interpolation of a matrix in 2D for complex numbers
To solve this i'm using interp2 right now. E_x_y_t([1:length(x)/4, length(x)/4+length(x)/2+1:length(x)],:,:) = []; E_x_y_t(:...

1 year ago | 0

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Interpolation of a matrix in 2D for complex numbers
Hello I have a 3D matrix of a field E_x_y_t. say it's 600 x 700 x 2048 (correlated to x y and t) At some point I'm deleting ...

1 year ago | 2 answers | 0

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FFT of gaussian if radial domain
Hi I defind a gaussian with cartesian dimain as written below. How do I make the same but with radial? without the angle (thet...

2 years ago | 1 answer | 0

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script transition from cartesian to cylindric issues
Hi I wrote a code for beam propagation in a medium but for some reason the cartesian vs the cylindric is different. I think i...

2 years ago | 0 answers | 0

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non uniform data using imagesc is wrong
Hi I have a matrix of values (see attached), with spaced frequencies. than i use the command imagesc(1:step_number, frequenc...

2 years ago | 1 answer | 0

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Long running time with loops, is it possible to cancel the loops?
Hi I have a code with many loops but it runs forever. Could you please take a look and let me know if somehow i can change to...

2 years ago | 1 answer | 0

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3d fitting surface from data. find function and it's tranverse
Hi I have data in the excel file. You can see there Col and Hor results. and input of two angles. (theta, phi) between -55 ...

3 years ago | 0 answers | 0

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Answered
fourier image of angled shape, and changes when cropping
Hi Attaching my script. you will see in the begining cropping=0; you can change that to 1 to make sure - something with my ...

3 years ago | 0

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fourier image of angled shape, and changes when cropping
Hi Attached is an image (please unzip) which has some kind of spot in an angle. I'm performing the following fft as in the ph...

3 years ago | 2 answers | 0

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Ellipse angle dimension and axis
Hi I need help with fitting automatically to ellipse. ( I have a photo of a spot from a camera. (added A=imread of the file i...

3 years ago | 1 answer | 0

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is it possible to replace for loops to fast it up?
Hello, Example of something i have is: for ang=1:length(angle) parfor dist=1:length(distance) sol(ang,dist)=abs(pu...

6 years ago | 1 answer | 0

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extracting phase from ifft on fft of a signal
Hello, I'm trying to extract a phase ifft function. But i'm getting something not logical (a triangle) In order to complica...

6 years ago | 0 answers | 0

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Applying bandpass around my signal
Hello, I'm trying to apply a bandpass around freq 0 without luck. I'd be happy to receive some help please x=scan11(1,:)...

6 years ago | 0 answers | 0

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short pulse fft and comprssion
Hello, I have a code that should take an initial pulse of FWHM gaussian in how i define it and add some phase to it in the sp...

6 years ago | 0 answers | 0

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implementing an envelope to a measured oscillated signal
Hello, I need to implement an envelope on oscillating scans I'm doing but I run into difficulties doing it. (the purpose is ...

6 years ago | 0 answers | 0

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noisy signal processing question. signal in detector with slope shift in some areas
Hello, I have several scans I did in a photodiode using an interferometer. The detector's size if very small so we see some...

6 years ago | 0 answers | 0

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getting rid of for loop in a function with long arrays
Here is a small function to calculate the neff of SM fiber. To this function I insert three long arrays: n_core, n_clad and lamd...

7 years ago | 2 answers | 0

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