Above are Star plots of 1979 Automobile analysis.
Monday, November 10, 2008
Correlation Matrix
A correlation matrix lists the variable names down the first column and across the first row. The diagonal of a correlation matrix always consists of ones. In every correlation matrix there are two triangles that are the values below and to the left of the diagonal and above and to the right of the diagonal. A correlation matrix is always a symmetric matrix.
Similarity matrix
A similarity matrix is a matrix of scores which show the similarities between two data points. They are generally used in sequence alignment. The higher the score the more similar characters it receives.
Stem & Leaf Plot
Stem and leaf plot is a way to show quantitative data in a graphical format to help visualize the distribution among categories. It came about from teh work of Arther Bowley in the early 1900's.
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