This repository contains data, code, and other materials for the ''Supercurrent through a single transverse mode in nanowire Josephson junctions'' Guideline: Extract data and simulation results and python scripts in the same address. Files: Raw_data_and_simulation_results.zip: Full original raw data, measurement, and simulation results (plotted extended data beyond paper figures) zipped for different cooldowns. Figure.zip: Paper figures, raw figure data, and data-processing code for paper figures. Python script for generating the main text figure.zip: Paper figures, raw figure data, and data-processing code for paper main text figures. Python script for generating the supplementary figure.zip: Paper figures, raw figure data, and data-processing code for paper supplementary figures. Tin_QPC_paper_simulation_code:Code used to reproduce simulation results in the paper. Tin_QPC_log: Full measurement log and ppt summary Data formats MTX: A simple 2D/3D matrix format developed for Spyview. DAT: Plain-text tabular data. DAT and MTX files can be plotted with Spyview, qtplot (a portable version for Windows can be downloaded here), and Jupyter notebooks in ZIP files or here. SET: Instrument settings. PY: Measurement scripts. IPYNB: Jupyter notebooks with code and figures. They can be previewed on this page.