RComplexion is an attempt to estimate the complexity of rhythm in osu! beatmaps using cross entropy. A deep model is trained to predict the timing of the next note in a beatmap given the timing of the previous notes. The theory is that the more complex the rhythm, the harder it is to predict the timing of the next note.
See datasets/rhythm_complexities.csv for the estimated complexities of some beatmaps.
The first column is the beatmap ID, and the second column is the estimated complexity.