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atan2d

Four-quadrant inverse tangent in degrees

Syntax

Description

example

D = atan2d(Y,X) returns the four-quadrant inverse tangent of points specified in the x-y plane. The result, D, is expressed in degrees.

Examples

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Inverse Tangent of Four Points on the Unit Circle

x = [1 0 -1 0];
y = [0 1 0 -1];
d = atan2d(y,x)
d =

     0    90   180   -90

Input Arguments

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Yy-coordinatesscalar value | vector | matrix | N-D array

y-coordinates, specified as a real-valued scalar, vector, matrix, or N-D array.

Data Types: single | double

Xx-coordinatesscalar value | vector | matrix | N-D array

x-coordinates, specified as a real-valued scalar, vector, matrix, or N-D array.

Data Types: single | double

Output Arguments

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D — Angles in degreesscalar value | vector | matrix | N-D array

Angles in degrees, returned as a scalar, vector, matrix, or N-D array. These angles correspond to the points defined by X and Y, and they lie in the closed interval [–180,180].

More About

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Tips

  • Use atand(Y/X) for the inverse tangent with results on the interval [–90, 90].

See Also

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