Heatmap of neighbourhood preservation ratio for regularized mm-tSNE. Neighbourhood preservation ratio for regularized mm-tSNE. The × axis is the values of λ we select for our experiment, y axis stands for numbers of maps. The colours of legend stand for the ratios progressively decreasing from high to low. Since the best ratio appears at , number of maps is 23, according to our results, we found that approximately 10 maps, appear to suffice for modelling nonmetric structure of phenotype similarities.