GeoXp (version 1.6.2)

rotation: Transform coordinates of sites using a rotation

Description

The function rotation() is used to modify coordinates of sites by a rotation with an angle equal to angle. This function is ude in deriftmap

Usage

rotation(coords, angle)

Arguments

coords

matrix $nx2$ of coordinates

angle

value of angle to use in rotation in degree

Value

matrix $nx2$ of new coordinates.

Details

Let: $$x=(cos(\theta),-sin(\theta))$$ $$y=(sin(\theta),cos(\theta))$$ $$nlecoord=coords \times cbind(x,y)$$

References

Thibault Laurent, Anne Ruiz-Gazen, Christine Thomas-Agnan (2012), GeoXp: An R Package for Exploratory Spatial Data Analysis. Journal of Statistical Software, 47(2), 1-23.

See Also

angleplotmap,variocloudmap