File format guidance notes
It is a principle of this site that all research data and associated files are stored
in open, cross-platform formats. Proprietary and other restrcited formats
(e.g. SPSS, E-prime, MATLAB ) will not be provided. Below is a brief guide to the
file formats used on this site:
- .mat - MATLAB 5.0 MAT-file - Although used by proprietary software, this is
open file format, that can be read by free software. For example,
it can be read by R (via the R.matlab package) and by OCTAVE.
- .png - raster graphics image file. ISO standard, cross-platorm support.
- .R - R is a free cross-platform general-purpose language
with particular strengths in statistical computing and graphics,
- .tar.bz2 - see .tbz
- .tbz - compressed archive, similar in purpose to ZIP. TBZ archives can be
opened by a variety of free packages (e.g. 7-Zip on Windows).
- .txt - tab-delimited plain text file. Openable on almost any computer.
Where .txt files contain raw data, this is in LONG format
(i.e. one row per trial per participant).
- .wav - audio file format, pretty much universal.