get_mass_props: Get mass properties for a row in a data frame

In massProps: Calculate Mass Properties and Uncertainties of Tree Structures

Get mass properties for a row in a data frame

Description

get_mass_props() creates a mass properties list from a selected row in a data frame.

Usage

get_mass_props(df, id)

Arguments

df	A data frame with (at least) these columns: id, mass, Cx, Cy, Cz, Ixx, Iyy, Izz, Ixy, Ixz, Iyz, POIconv, Ipoint.
id	The id value of the desired row.

Value

A list with the following named elements:

• mass Numeric mass.

• center_mass Numeric 3-vector center of mass.

• point Logical indicating point mass. The inertia of point masses is excluded from calculations.

• inertia Numeric 3x3 matrix inertia tensor. The signs of the off-diagonal elements of the inertia tensor are determined by POIconv. For example, the xy element of the inertia tensor is Ixy if POIconv is "-"; it is -Ixy if POIconv is "+".

Examples

get_mass_props(mp_table, "C.1.2.2.3.1.2.3")

massProps documentation built on June 8, 2025, 12:42 p.m.