convert_density_units: Restate the units of a density in a different density measure

In mizer: Dynamic Multi-Species Size Spectrum Modelling

Restate the units of a density in a different density measure

Description

The per-size factor is found in either of the two spellings mizer uses for it, 1/g and g^-1, and is then swapped for the size unit of the target measure. A density per logarithmic size carries no size unit at all — a number per log weight interval is just a number — so converting to one removes the factor instead: 1/g becomes dimensionless and g^-1/year becomes 1/year.

Usage

convert_density_units(units, from, to)

Arguments

units	The units of the values, possibly NULL.
from, to	Density measures, see density_measures.

Details

Units that state no per-size factor are returned unchanged, since there is then nothing to identify as the size unit.

Value

The units expressed in the to measure.

mizer documentation built on Aug. 24, 2026, 9:08 a.m.