RR-Lyr-Method-Comparison: Period-Metallicity-Luminosity relation validation for RR Lyrae stars

The software package we developed for period-metallicity-luminosity (PML) relation (of RR Lyrae pulsators) validation purposes consists of several independently working python scripts (as well as some necessary modules). In order to validate the PML relations we make use of Tukey's mean difference/Bland-Altman (Altman & Bland 1983; Bland& Altman 1986) & Krouwer (Krouwer  2008) plots, as well as Passing-Bablok regression (Passing & Bablok 2009).

It should easily be extendable to other PML relations/approaches (for example Period-Wesenheit relations). The main script works in python 2.7, whereas the query scripts have been tested/used in 3.6.