quadrupole {cooltools}

Quadrupole tensor

Description

Compute the trace-free quadrupole tensor of a set of point masses

Usage

quadrupole(x, m = 1)

Arguments

x

n-by-3 matrix (x[1:n,1:3]) specifying the 3D Cartesian coordinates of n points

m

n-vector with point masses, or single scalar giving a uniform mass for all points (default is unity)

Value

Returns a 3-by-3 symmetric matrix

Author(s)

Danail Obreschkow

See Also

inertia, moments