`(p)=atan2(y,x)`

`(p)=atan2(y,x,deg)`

Inputs | |

`x` |
A real array. The arary of`y` -coordinates of points. |

`b` |
A real array of the same size as `a` .The array of `x` -coordinates of points. |

`deg` |
Optional input. |

Outputs | |

`p` |
A real array of the same size as `a` . |

For each pair

`(yi,xi)`

of elements of `(y,x)`

,
the corresponding element of the output `p`

is the angle between the
x-axis and the vector pointing from the
origin to the point `(xi,yi)`

.
If the optional argument `deg`

is given any value ,
the angles are returned in degrees ; otherwise the
angles are in radians.
>>atan2(2,0,1)90>>atan2(2,2)0.7854>>atan2(2,-2,1)135>>atan2(-2,2,1)-45>>atan2(-1,0,1)-90