From left to right: distributions of the r-band absolute magnitude, half-light radius, and log(M_⋆/M_⊙). The white histograms correspond to the complete CALIFA sample (939 galaxies), and the gray-filled areas correspond to our sample (380 galaxies). A visual inspection of these histograms together with the perform of the K-S test probability show that our sample is representative in terms of galaxy properties of the entire CALIFA sample.