| pol2cart | R Documentation | 
The inputs theta, r, (and z) must be the same shape, or
scalar.  If called with a single matrix argument then each row of P
represents the polar/(cylindrical) coordinate (theta, r
(, z)).
pol2cart(theta, r = NULL, z = NULL)
| theta | describes the angle relative to the positive x-axis. | 
| r | is the distance to the z-axis (0, 0, z). | 
| z | (optional) is the z-coordinate | 
a matrix C where each row represents one Cartesian
coordinate (x, y (, z)).
Kai Habel
David Sterratt
cart2pol, sph2cart,
cart2sph
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