The I2MC algorithm was designed to accomplish fixation detection in data across a wide range of noise levels and when periods of data loss may occur. Cite as: Hessels, R.S., Niehorster, D.C., Kemner, C., & Hooge, I.T.C., (2016). Noise-robust fixation detection in eye-movement data - Identification by 2-means clustering (I2MC). Submitted. For more information, questions, or to check whether we have updated to a better version, e-mail: royhessels@gmail.com / dcnieho@gmail.com. I2MC is available from www.github.com/royhessels/I2MC Most parts of the I2MC algorithm are licensed under the Creative Commons Attribution 4.0 (CC BY 4.0) license. Some functions are under MIT license, and some may be under other licenses. Quick start guide for adopting this script for your own data: 1) Build an import function specific for your data (see importTobiiTX300 for an example). 2) Change line 106 to use your new import function. The format should be: data.time for the timestamp data.left.X & data.left.Y for left gaze coordinates data.right.X & data.right.Y for right gaze coordinates data.average.X & data.average.Y for average of right and left gaze coordinates You may provide coordinates from both eyes, only the left, only the right, or only the average. Gaze coordinates should be in pixels, timestamps should be in milliseconds 3) Adjust the variables in the "necessary variables" section to match your data 4) Run the algorithm Requirements: Signal Processing Toolbox for downsampling. If not available you may set opt.downsample to []. This may, however, degrade performance of the algorithm. Tested on MATLAB R2012a, R2014b & R2016a