rotx4 {GEOmap}

x-axis rotation matrix

Description

x-axis rotation matrix

Usage

rotx4(vec)

Arguments

vec

vector of direction cosines

Details

Length of vector cannot be zero.

Value

Matrix for rotation

Author(s)

Jonathan M. Lees<[e-mail]>

See Also

roty4, rotdelta4

Examples

v = c(12,13,-4)

rotx4(v)