ISO_6976 News
ISO_6976 0.1-0 (2026-03-28)
Initial release — clean-room implementation of ISO 6976:2016 for
CRAN.
Scope
Implements all properties and uncertainties defined in ISO
6976:2016:
- Compression factor Z (§5, Eq. 1)
- Molar mass M (Eq. 5)
- Ideal-gas and real-gas gross and net calorific values on molar,
mass, and volumetric bases (Eqs. 2–12)
- Ideal-gas and real-gas density and relative density (Eqs.
13–19)
- Ideal-gas and real-gas gross and net Wobbe indices (Eqs. 15–16,
20–21)
- Standard uncertainties of all properties (Annex B, Eqs.
B.4–B.14)
Design decisions
- Single Rcpp back-end (
iso6976_calc) computes all
properties in one call.
GasComponents R6 class provides named component access
without normalization (normalization is outside the scope of ISO
6976:2016).
- Component names are in English following ISO 6976:2016 Table
A.2.
- Reference data sets
example1, example2,
example3, example3_ex are the worked examples
from ISO 6976:2016 Annex D.