This is the main repository for a distributed data set associated with the paper ‘Euclid: Modelling massive neutrinos in cosmology — a code comparison’. This record holds the scripts needed for generating all figures and power spectra, as well as some demonstration scripts. All is governed by a Makefile, which can also be used to download further data records. The finished figures are included as well. This is a direct record of the GitHub repository jmd-dk/nucodecomp-data, created by Jeppe Dakin (jeppe.dakin@uzh.ch). To get started exploring the data, download and extract the ZIP file contained within this record, or clone the Git repository: git clone https://github.com/jmd-dk/nucodecomp-data.git See the README.md file for further detailed explanation, previewed below but best displayed on GitHub. Links to records for the distributed data set: data-figure: 10.5281/zenodo.7868184 data-snapshot-fiducial: 10.5281/zenodo.7295447 data-snapshot-0.0eV-1024Mpc: 10.5281/zenodo.7295478 data-snapshot-0.15eV-1024Mpc-z0: 10.5281/zenodo.7295497 data-snapshot-0.15eV-1024Mpc-z1: 10.5281/zenodo.7295536 data-snapshot-0.0eV-HR: 10.5281/zenodo.7295886 data-snapshot-0.15eV-HR-z0: 10.5281/zenodo.7296101 data-snapshot-0.15eV-HR-z1: 10.5281/zenodo.7296119 data-ic-fiducial: 10.5281/zenodo.7295356 data-ic-1024Mpc: 10.5281/zenodo.7295382 data-ic-HR: 10.5281/zenodo.7295425