Fig. 4From: Compositional variation of the human fecal microbiome in relation to azo-reducing activity: a pilot studyHeatmap visualization of hierarchical clustering of the gut microbiota composition at the genus level. Samples are categorized according to different criteria and arranged according to their azo-reducing activity. Colors on top of the heatmap represent the azo-reducing activity to which samples belong, subject sex, and subject BMI category. Heatmap color (blue to dark red) displays the row-scaled relative abundance of each taxon across all samples. Clustering was based on Euclidean distancesBack to article page