cart2clock: Convert Cartesian Coordinates to Clock Coordinates

In IDPmisc: 'Utilities of Institute of Data Analyses and Process Design (www.zhaw.ch/idp)'

Description

Converts cartesian coordinates (x, y to clock coordinates (rho, phi)

Usage

cart2clock(x, y, circle)

Arguments

x, y	Cartesian coordinates.
circle	Defines the full circle in the units of phi.

Details

Be aware that in clock coordinates and polar coordinate the angle phi is differently defined!

Value

Data frame with

rho	Distance of point from center of coordinate system.
phi	Angle between North (12 o' clock), center and the point, measured clockwise.

Author(s)

Rene Locher

See Also

clock2cart, rose-class

Examples

## convert clock coordinates to cartesian coordinates
xy <- clock2cart(rho=rep(1,33),phi=seq(0,to=360,length.out=33),circle=360)

## convert the cartesian coordinates back to clock coordinates
rhophi <- cart2clock(xy$x,xy$y,circle=360)

round(clock2cart(rhophi,circle=360)-xy)
## QED

Example output

   x y
1  0 0
2  0 0
3  0 0
4  0 0
5  0 0
6  0 0
7  0 0
8  0 0
9  0 0
10 0 0
11 0 0
12 0 0
13 0 0
14 0 0
15 0 0
16 0 0
17 0 0
18 0 0
19 0 0
20 0 0
21 0 0
22 0 0
23 0 0
24 0 0
25 0 0
26 0 0
27 0 0
28 0 0
29 0 0
30 0 0
31 0 0
32 0 0
33 0 0

IDPmisc documentation built on Jan. 21, 2020, 5:06 p.m.