rotate_xy: Rotate a matrix of x and y coordinates by a radian
Description
Rotate a matrix of x and y coordinates by a radian
Usage
rotate_xy(xy_mat, rad, direction = 1)
Arguments
- xy_mat
A two column matrix with x and y coordinates.
- rad
Numeric.
Rotation angle in radian.
- direction
Numeric.
Rotation direction, 1
for clockwise -1
for counter-clockwise.