The data structure for the Pickles data set contains the column "luminosity", which holds not the luminosity class, but rather the spectral class. See https://en.wikipedia.org/wiki/Stellar_classification#Luminosity_class for an explanation. The actual luminosity class is stored in the "evolution" column, whose name is at least physically more or less correct.
The data structure for the Pickles data set contains the column "luminosity", which holds not the luminosity class, but rather the spectral class. See https://en.wikipedia.org/wiki/Stellar_classification#Luminosity_class for an explanation. The actual luminosity class is stored in the "evolution" column, whose name is at least physically more or less correct.