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Questions - atan2

How to expand atan2 to plus/minus 3pi

I want to estimate the phase of harmonic distorted tones when having input tones with random initial phase within [-pi;pi]. I used atan2, build-in function of Matlab, however the phase jump at -pi or ...
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user190055

matlab

difference

distortion

phase

atan2

Votes: 0

Answers: 1

Latest Answer

The function you want is unwrap, e.g., >>> angles=[-0.7*pi -0.9*pi 0.9*pi 0.7*pi] angles = -2.1991e+00 -2.8274e+00 2.8274e+00 2.1991e+00 >>> unwrap(angles)/pi ans = -7.0000e...
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bg2b

Numerical evaluation of arctangent functions

I am having difficulties to interpret results of arctangent functions. This behaviour is consistent for all implementations I came across, so I will here limit myself to NumPy and MATLAB. The idea is ...
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rad

numpy

matlab

precision

atan2

atan

Votes: 0

Answers: 1

Latest Answer

Notice that you are using integers So for each pair (p,q) you will have floor(sqrt(p**2 + q**2)/gcd(p,q)/r) pairs that give the same angle arctan(p,q). Then for the multiples of (p,q) the gcd(p,q) is ...
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Bob

Atan2 Precision Problems

when I tried to calculate the homogeneous matrix in two different ways, there was a very small discrepency, 0 and 0.000000000000000061229677524420688 are in the same location of the two matrice. The n...
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Liu

.net

math

atan2

Votes: 0

Answers: 1

Latest Answer

Your atan2 arguments are not valid in math sense, this function is not defined for both zeros. Note that first argument should be r*sin(fi), the second one - r*cos(fi) for some angle fi and r>0 In ...
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MBo

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