quadrupole

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

Collection of routines for efficient scientific computations in physics and astrophysics. These routines include utility functions, numerical computation tools, as well as visualisation tools. They can be used, for example, for generating random numbers from spherical and custom distributions, information and entropy analysis, special Fourier transforms, two-point correlation estimation (e.g. as in Landy & Szalay (1993) <doi:10.1086/172900>), binning & gridding of point sets, 2D interpolation, Monte Carlo integration, vector arithmetic and coordinate transformations. Also included is a non-exhaustive list of important constants and cosmological conversion functions. The graphics routines can be used to produce and export publication-ready scientific plots and movies, e.g. as used in Obreschkow et al. (2020, MNRAS Vol 493, Issue 3, Pages 4551–4569). These routines include special color scales, projection functions, and bitmap handling routines.

Danail Obreschkow

cooltools

Practical Tools for Scientific Computations and Visualizations

quadrupole function

<dl><dt>x</dt>
<dd>n-by-3 matrix (x[1:n,1:3]) specifying the 3D Cartesian coordinates of n points</dd>
<dt>m</dt>
<dd>n-vector with point masses, or single scalar giving a uniform mass for all points (default is unity)</dd></dl>

Arguments

Author

Quadrupole tensor — quadrupole

<dl>

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


<dt>m</dt>
<dd>n-vector with point masses, or single scalar giving a uniform mass for all points (default is unity)</dd>

</dl>

quadrupole: Quadrupole tensor

Description

Usage

Value

Arguments

Author

See Also