Here is an example of a cluster scatterplot of the 5-cluster model in thePreview. It shows the distribution of 5 clusters for the Mammals case study, in which the horizontal and vertical axes are the first and second principal components, computed by ClustanGraphics.
In this example, each of the clusters is displayed using a different colour. Alternatively, you can use a different symbol for each cluster, which is helpful when publishing a scatter diagram in a report or journal, as follows:
The clusters on a scatterplot can also be labelled either by cluster names specified in the Cluster/Scatterplots dialogue or by clusterexemplars.
Scatterplot axes can be any combination of two data variables, external variables,principal components or MDS dimensions. In the above example, we plotted the five cluster solution for the Mammals dataset on the first two principal components. In the final example (left), the five cluster solution has been plotted on MDS dimensions and the cluster labels have been specified in the dialogue. You can change the labelling font, size and colour, and label the cluster by case names, cluster names, cluster exemplars, or just leave the points unlabelled.