A Fuzzy Plot is a 2D Scatter Plot that displays the result of Sammon's Nonlinear Mapping together with a fuzzy clustering. The values u[i,k] (i=1,...,nPoints; k=1,...,nPoints), which states the membership of the i.th observation for the cluster k, can be computed for example with fanny from the package cluster.
The VisuClust package provides functions to display the result of clusterings, if they are either disjoint (every observation belongs to one cluster) or fuzzy (for each observation i and cluster k there is a value u[i,k](i=1,...,nPoints; k=1,...,nClusters)), which states the membership of the i.th observation for the cluster k, where sum(u[i,k],k=1,...,nClusters) = 1). A disjoint clustering can be created with known hierarchical methods, if the desired number of clusters is provided, or by using k-means-clustering (for example hclust, kmeans from the package cluster). A fuzzy clustering can be created for example with fanny from the package cluster.
A Linkage Map is a 2D Scatter Plot that displays the result of Sammon's Nonlinear Mapping. A number of ranges (>= 1) for the distance values d[i,j] can be defined. Each point pair whose distance is inside of the defined range is connected with a line.
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