Fig. 6From: Visualizing phylogenetic tree landscapesPhylogenetic tree landscape by NLDR method. Projections of RF-distances representing the concatenated bootstrap trees from 15 mammal mtDNA genes. Colors represent mtDNA bootstrap trees. Projections correspond to following cost function and optimization algorithm; a CCA plus SGD, b CCA plus MCMC, c NLM plus SGD, and d an alternative minima of CCA plus SGDBack to article page