The star plot is a method of displaying multivariate data. Each star represents a single observation. A star plot is typically generated in a multi-plot format with many stars on each page and each star representing one observation.
Monday, December 8, 2008
Correlation matrix
A correlation matrix illustrates the correlations between all pairs of data sets.
Similarity matrix
A similarity matrix is a matrix of scores that express the similarity between two data points. The elements of such, measure pairwise similarities of objects; therefore, the greater similarity of two objects, the greater the value of the measure.
Stem and leaf plot
A stem and leaf plot is a type of graph that is similar to a histogram but shows more information. The stem and leaf plot summarizes the shape of a data set (the distribution) and provides extra detail regarding individual values.
Box plot
A box plot is a convenient way of graphically depicting groups of numerical data through their five number summaries (the smallest observation, lower quartile, media, upper quartile, and largest observation). Box plots can be drawn either horizontally or vertically.
Histogram
A histogram is a graphical display of tabulated frequencies, shown as bars. It shows what proportion of cases fall into each of several categories. A histogram differs from a bar chart in that it is the area of the bar that denotes the value, not the height as in bar charts, a crucial distinction when the categories are not of uniform width.
Parallel coordinate graph
A parallel coordinate graph is used to plot large multivariate data sets. Each variable in the data plot is represented as its own Y Axis on the graph. A maximum point for each Y axis is selected, and they are scaled relative to each other so that each variable takes up the same area in the graph space.
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