DescTools: Tools for Descriptive Statistics

Description Usage Arguments Details Value Author(s) Examples

Transform cartesian into polar coordinates, resp. to spherical coordinates and vice versa.

CartToPol(x, y)
PolToCart(r, theta)

CartToSph(x, y, z, up = TRUE)
SphToCart(r, theta, phi, up = TRUE)

`x, y, z`	vectors with the xy-coordianates to be transformed.
`r`	a vector with the radius of the points.
`theta`	a vector with the angle(s) of the points.
`phi`	a vector with the angle(s) of the points.
`up`	logical. If set to `TRUE` (default) theta is measured from x-y plane, else theta is measured from the z-axis.

Angles are in radians, not degrees (i.e., a right angle is pi/2). Use DegToRad to convert, if you don't wanna do it by yourself.
All parameters are recycled if necessary.

PolToCart returns a list of x and y coordinates of the points.
CartToPol returns a list of r for the radius and theta for the angles of the given points.

Andri Signorell <andri@signorell.net>, Christian W. Hoffmann <christian@echoffmann.ch>

CartToPol(x=1, y=1)
CartToPol(x=c(1,2,3), y=c(1,1,1))
CartToPol(x=c(1,2,3), y=1)


PolToCart(r=1, theta=pi/2)
PolToCart(r=c(1,2,3), theta=pi/2)

CartToSph(x=1, y=2, z=3)   # r=3.741657, theta=0.930274, phi=1.107149