"pearson","average"
"pearson","centroid"
"pearson","complete"
"pearson","mcquitty"
"pearson","median"
"pearson","single"
"pearson","ward"
"correlation","average"
"correlation","centroid"
"correlation","complete"
"correlation","mcquitty"
"correlation","median"
"correlation","single"
"correlation","ward"
