GLMsingle version 1.2 with added diagnostics and fixes in Python

In this release of GLMsingle, we added novel diagnostics printed in the terminal, novel diagnostic figures, and we made significant efforts to make the outputs almost identical between matlab and python (up to numerical precision), for the results and figures.

GLMsingle version 1.1 (eLife manuscript)

This is GLMsingle version 1.1, which corresponds to what is described in the Prince et al. eLife 2022 paper.