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BIPLOT: Stata module to generate biplots

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Author Info

  • Ulrich Kohler

    ()
    (WZB)

Abstract

biplot draws biplots of the data matrix defined by varlist. Biplots are useful for visual inspection of data matrices, allowing the eye to identify patterns, regularities and outliers. In a biplot variables (columns) are shown as arrows from the origin and observations (rows) are shown as points. The configuration of arrows reflects the relations of the variables. The cosine of the angle between the arrows reflects the correlation between the variables they represent. If the variables are not standardized, the length of each arrow reflects the standard deviation of the variable it represents. The scatter of observations shows relations among observations. The distance between two points approximates the Euclidean distance between two observations of the data matrix. The cutpoint of a perpendicular from a point to an arrow shows the value of the variable the arrow represents.

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File URL: http://fmwww.bc.edu/repec/bocode/b/biplot.ado
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File URL: http://fmwww.bc.edu/repec/bocode/b/biplot.hlp
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File URL: http://fmwww.bc.edu/repec/bocode/b/biplot5.ado
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Bibliographic Info

Software component provided by Boston College Department of Economics in its series Statistical Software Components with number S335501.

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Programming language: Stata
Requires: Stata version 5.0
Date of creation: 23 Feb 1998
Date of revision: 17 Jan 2005
Handle: RePEc:boc:bocode:s335501

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Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA
Phone: 617-552-3670
Fax: +1-617-552-2308
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Web page: http://fmwww.bc.edu/EC/
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