  Machine learning techniques are applied to make prediction models of the G0W0
band-gaps for 156 AX binary compounds using Kohn-Sham band-gaps and other
fundamental information of constituent elements and crystal structure as
predictors. Ordinary least square regression (OLSR), least absolute shrinkage
and selection operator (LASSO) and non-linear support vector regression (SVR)
methods are applied with several levels of predictor sets. When the Kohn-Sham
band-gap by GGA (PBE) or modified Becke-Johnson (mBJ) is used as a single
predictor, OLSR model predicts the G0W0 band-gap of a randomly selected test
data with the root mean square error (RMSE) of 0.54 eV. When Kohn-Sham band gap
by PBE and mBJ methods are used together with a set of various forms of
predictors representing constituent elements and crystal structures, RMSE
decreases significantly. The best model by SVR yields the RMSE of 0.18 eV. A
large set of band-gaps estimated in this way should be useful as predictors for
materials exploration.
