The dataset provides open data and code for the research paper "Reservoir computing with collective dynamics of active colloidal oscillators." It includes experimental and simulation data, along with evaluation and plotting code in both Python and MATLAB. The total dataset size is approximately 2.3 GB, containing files such as exp_data.zip, sim_data.zip, data_evaluation_python.zip, data_evaluation_matlab.zip, and plot_figures.zip. The purpose of this dataset is to reproduce the results and figures from the associated study, which explores using active colloidal oscillators for reservoir computing.