2-quadrant and 4-quadrant element-wise inverse tangent, result in degree. (original) (raw)
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Scilab help >> Elementary Functions > Trigonometry > atand
atand
2-quadrant and 4-quadrant element-wise inverse tangent, result in degree.
Calling Sequence
phi=atand(x) phi=atand(y,x)
Arguments
x
real scalar, vector or matrix
phi
real scalar, vector or matrix
x, y
real scalars, vectors or matrices of the same size
phi
real scalar, vector or matrix
Description
The first form computes the 2-quadrant inverse tangent, which is the inverse of tand(phi). The`` phi elements are in the interval [-90, 90].
The second form computes the 4-quadrant arctangent (atan2 in Fortran), this is, it returns the argument (angle) of the complex numberx+i*y. The range of atand(y,x) is [-180,180i].
Both forms yield identical values ifx>0.
Examples
x=[0,1/sqrt(3),1,sqrt(3),%inf,0] atand(x)
See Also
Authors
- Serge Steer, INRIA