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What is the difference between arctan and arctan2 in matlab simulink?

researchgate.net › post › What-is-the-difference-between-arctan-and-arctan2-in-matlab-simulink

The atan function simply computes the inverse tangens of a value. The atan2 function takes two values (y and x). This function is used to convert from cartesian coordinates (x,y) to polar coordinates (r,phi), where phi=atan(y,x). Answer from Alexander Täschner on researchgate.net

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atan2 - Four-quadrant inverse tangent - MATLAB

In contrast, atan(Y/X) returns results that are limited to the interval [–π/2, π/2], shown on the right side of the diagram. For real inputs, atan2 has a few behaviors that differ from those recommended in the IEEE®-754 Standard. ... The atan2 function fully supports tall arrays.

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researchgate.net › post › What-is-the-difference-between-arctan-and-arctan2-in-matlab-simulink

What is the difference between arctan and arctan2 in matlab simulink? | ResearchGate

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The atan function simply computes the inverse tangens of a value. The atan2 function takes two values (y and x). This function is used to convert from cartesian coordinates (x,y) to polar coordinates (r,phi), where phi=atan(y,x).

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http://stackoverflow.com/questions/283406/what-is-the-difference-between-atan-and-atan2-in-c

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mathworks.com › matlabcentral › answers › 343418-maths-formula-behind-atan2-function

Maths/formula behind atan2 function - MATLAB Answers - MATLAB Central

June 5, 2017 - The difference is important when you need a 4 quadrant result. This is a major reason why atan2 exists. As well, atan2 is a bit more robust to problems. So, while atan would have survived this one:

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atan2 - Symbolic four-quadrant inverse tangent - MATLAB

Results returned by atan2(Y,X) belong to the closed interval [-pi,pi]. Meanwhile, results returned by atan(Y/X) belong to the closed interval [-pi/2,pi/2]. Calling atan2 for numbers (or vectors or matrices of numbers) that are not symbolic objects invokes the MATLAB® atan2 function.

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mathworks.com › matlabcentral › answers › 429523-atand-and-atan2d

atand and atan2d - MATLAB Answers - MATLAB Central

November 13, 2018 - The red line is atand and the blue line is atan2d.

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stackoverflow.com › questions › 54410492 › unwrapping-atan-vs-atan2

matlab - Unwrapping atan vs. atan2 - Stack Overflow

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The second argument to unwrap is not the period of the input data, but the tolerance. The function always unwraps data assuming a 2π interval. That is, it wants to see that x(i)-x(i+1) is larger than the tolerance before unwrapping, and smaller after unwrapping. In the case of a tolerance of pi/2, if, for example, x(i)=0 and x(i+1)=3, the jump is larger than the tolerance, but adding or subtracting 2*pi to x(i+1) does not improve things.

One work-around would be to multiply the input by 2, and divide by 2 after unwrapping:

unwrap(theta_atan * 2) / 2

However, it is always best to use atan2 to obtain an angle.

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mathworks.com › matlabcentral › answers › 1627570-if-z-is-a-vector-what-is-the-difference-between-angle-z-and-atan2-z

If z is a vector , what is the difference between angle(z) and atan2(z) - MATLAB Answers - MATLAB Central

January 12, 2022 - The two functions will be compatible, as long as you use them properly. remember that atan2 is a TWO argument utility. You need to separate out the real and imaginary parts to use atan2 or atan2d.

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mathworks.com › matlabcentral › answers › 1815610-what-the-difference-between-the-phase-and-arctan

what the difference between the phase and arctan? - MATLAB Answers - MATLAB Central

October 1, 2022 - https://www.mathworks.com/matlabcentral/answers/1815610-what-the-difference-between-the-phase-and-arctan#answer_1064715 · Cancel Copy to Clipboard · phase(z) = atan2(imag(z),real(z)) Read the documentation for atan2 to find the differences to the usual atan function: https://de.mathworks.com/help/matlab/ref/atan2.html ·

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mathworks.com › matlab › mathematics › elementary math › trigonometry

atan - Inverse tangent in radians - MATLAB

This definition of the atan function returns angles in radians within the interval [-π/2, π/2]. To find the four-quadrant inverse tangent, where the returned angles are in the interval [-π, π], use atan2. ... The atan function fully supports tall arrays. For more information, see Tall Arrays.

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atan2 - Four-quadrant inverse tangent of fixed-point values - MATLAB

Use the atan2 function to calculate the arctangent of unsigned and signed fixed-point input values.

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mathworks.com › matlabcentral › answers › 1878637-how-to-convert-asin-function-to-atan2-function

How to convert asin function to atan2 function? - MATLAB Answers - MATLAB Central

December 15, 2022 - Sorry, but let me explain in some depth. atan2 is a TWO argument version of the inverse tangent. The tangent function, and its inverse atan (as opposed to atan2) does work like the sin function, and its inverse asin.

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mathworks.in › help › matlab › ref › atan2.html

MATLAB atan2 - Four-quadrant inverse tangent

Learn core MATLAB functionality for data analysis, modeling, and programming.

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nl.mathworks.com › matlabcentral › answers › 9330-changing-the-atan-function-so-that-it-ranges-from-0-to-2-pi

Changing the atan function so that it ranges from 0 to 2*pi - MATLAB Answers - MATLAB Central