Diagram of color indices g − i and inverse concentration indexes R50/R90 of 316 031 galaxies at z < 0.1 from the SDSS DR9 after applying the support-vector machine (SVM) method: red for early E types (from elliptical to lenticular) and blue for late L types (from S0a to irregular Im/BCG). The color bar from 0 to 1 shows the SVM probability to classify galaxy as late to early morphological types.