Monday, August 4, 2008

star plots


A star plot displays multivariate data. Each individual star represents a single observation. Here is an example of a star plot with different car models http://www.itl.nist.gov/div898/handbook/eda/section3/gif/starplot.gif

correlation matrix



A correlation matrix basically computes the correlation coefficients of the columns of a matrix. Here is an example that includes Pearson Correlation Coefficients , Significance, Number of Observations.http://www.kltprc.net/policynotes/Gifs/Tab_005A_4.gif

similarity matrix


The similarity matrix shows a matrix of scores that explains the likeness between two data points. Here is an example of a similarity matrix. http://tomcat.esat.kuleuven.be/txtgate/images/distmat.png

Stem and Leaf Plot


Stem and leaf plots (or also known as stemplots) are similar to histograms. However they stemplots retain the original data to at least two significant digits, and put the data in order. Here is an example of ages of a family reunion. http://www.eduplace.com/math/mhm/5/06a/ts_5_6a_wi-1.gif

Box Plot


A box plot or a box and whisker plot boxplot graphically shows groups of numerical data through their five number summaries. Here is an example with stopping distances.http://math.youngzones.org/boxplot.gif

Histogram


A histogram is a display of tabulated frequencies displayed in a graphical context. It displays what shows what proportion of cases fall into each of several categories.http://www.aivosto.com/project/help/pm-histogram.gif

Parallel coordinate graph



A parallel coordinate graph connects a series of values, that are associated differently with a variable that measures multiple aspects of something. Here is an example for a baseball team.