Self-organizing map of electron-impact mass-spectra

This text file is a self-organising map (256 x 256 grid units) of mass spectra.

The mass spectra are stored as a continuous list. In the file, consecutive sets of 256 rows in the file are one row of the map (each row has 256 grid units). After every 256th row in the file, a new map row begins (256 rows in total).

The mass spectra are electron-impact mass-spectra, as they are typically recorded in gas chromatography. The resolution is unit mass, the spectral range is limited to 29 - 200 m/z, and the spectral intensities are normalized.

The mass spectra were collected from the Mass Bank of North America (MassBank of North America. https://mona.fiehnlab.ucdavis.edu/ (accessed 2018-07-05)) and are used under a CC-BY 4.0 license.