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seen Apr 17 at 6:12

Dec
19
awarded  Popular Question
Jan
17
asked integer S transform
Jan
14
revised integer transform
added 9 characters in body
Jan
13
asked integer transform
Jan
13
comment integer transform
Thanks for reply. I modified the questions to be more clear.
Jan
13
revised integer transform
added 19 characters in body
Jan
13
awarded  Editor
Jan
13
revised integer transform
added 19 characters in body
Jan
12
asked integer transform
Jan
12
comment reversible integer transform
Thanks for clarifications.
Jan
12
comment reversible integer transform
2*x'+y'=2*(x+(x-y))+y-(x-y)=2*x+x-y+y=3*x and 2*y'+x'=2*(y-(x-y))+x+(x-y)=2y-2x+2y+2x-y=3y. So the transform map integer pairs to integer pairs.
Jan
12
awarded  Student
Jan
12
asked reversible integer transform
Jan
12
comment Fourier transform in cylindrical coordinates
$*$ is scalar product
Jan
12
comment Fourier transform in cylindrical coordinates
Thanks for information. I read again and I understood your response. The basic algorithm is: -transform Cartesian coordinates in cylindrical coordinates. In Matlab exist the function car2pol.For X,Y, Z vectors which represent Cartesian coordinates,it's necessary to obtain the cylindrical coordinates (ρ,ϕ,$v_z$). So we write:[ρ,ϕ,$v_z$]=car2pol(X,Y,Z).F is the vector with all values of f(ρ,ϕ,$v_z$). I apply fft to F: G=fft(f); Let be Polar_FFT polar fft function, where we suppose that is implemented. For having the final result I must write: $H=\text{Polar_FFT}(G*exp[−i2πv_ρρcos(v_ϕ−ϕ)])$?
Jan
12
comment Fourier transform in cylindrical coordinates
What is connection between $\widehat{f}(vρ,vϕ,vz)$ and $ \overline{f}(ρ,ϕ,vz)$?
Jan
11
comment Fourier transform in cylindrical coordinates
Can you give me an example to verify the code?
Jan
11
comment Fourier transform in cylindrical coordinates
Thanks for the response. I'm working with 3D transform.
Jan
11
asked Fourier transform in cylindrical coordinates