evaluation_object: the output of either a Cluster_Medoids or Clara_Medoids function
silhouette: either TRUE or FALSE, indicating whether the silhouette widths or the dissimilarities should be plotted
Returns
TRUE if either the silhouette widths or the dissimilarities are plotted successfully, otherwise FALSE
Details
This function takes the result-object of the Cluster_Medoids or Clara_Medoids function and depending on the argument silhouette it plots either the dissimilarities or the silhouette widths of the observations belonging to each cluster.