A similarity matrix measure pairwise similarities of objects. The greater similarity between the two examined objects, the greater the value of the measure in the matrix.
A Star Plot is a method of displaying multivariate data. Each star represents a one, individual observation. Star plots are usually generated in a multivariate format with numerous stars on each page and each star continuously displaying one observation.
Stem-and-leaf plots show the frequency with which certain classes of values occur. You could use a stem-and-leaf plot and let the graph show the numbers themselves rather than using another form of graph.
A Box Plot is a diagram depicting a set of ranked numerical data. A box represents the range of numbers. Lines, also know as whisker, project from the box to represent the maximum and minimum values.
A Triangular plot is a graph of 3 variables. It is most often used in geologic studies,but it can be applied to any system of 3 variables to represent data.