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4. Create three distance matrices using the dist function in R for the 95gene data set. The first should be Euclidean distance, next 1 minus the Pearson correlation coefficient, and the third 1 minus the absolute value of the Pearson correlation coefficient. Next, create a dendrogram using average linkage clustering for each distance measure.
 Are the dendrograms different and, if so, why are they different?
 Would a dendrogram created using single linkage clustering instead of average linkage clustering be different? Why would the dendrogram be different?


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