September 2017
Beginner to intermediate
560 pages
25h 18m
English
book
R Data Analysis Cookbook, Second Edition - Second Edition
by Kuntal Ganguly, Davor Lozić, Mzabalazo Z. Ngwenya, Andrew Bauman, Shanthi Viswanathan, Viswa Viswanathan
Content preview from R Data Analysis Cookbook, Second Edition - Second Edition
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How it works...
The PAM algorithm is based on the search for k-medoids among the observations of the dataset. Unlike K-means clustering, where the calculation of cluster centroids could result in the centroid being outside the actual data points, medoids should always be represented from within the actual data points. After finding a set of k-medoids, k-clusters are constructed by assigning each observation to the nearest medoid.
In this example, we first apply the PAM algorithm using the pam() function from the cluster package on the scaled protein intake data frame. Next, we find the four cluster medoids (Romania, W Germany, Sweden, and Spain) from the fitted PAM model and finally visualize the cluster plot using fviz_cluster() from the ...
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