Boxplotted tables and other graphical techniques for exploratory data analysis.
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Authors
Isusi, Juan M.
Subjects
Boxplots
Scatter Plots
Draftsman Plots
Star Plots
Profile Plots
APL
GRAFSTAT
Scatter Plots
Draftsman Plots
Star Plots
Profile Plots
APL
GRAFSTAT
Advisors
Lewis, P.A.W.
Date of Issue
1986
Date
September 1986
Publisher
Language
en_US
Abstract
This thesis presents several interactive computer programs for the analysis of
multivariate data. A special case is that of panel data; multiple time series of short
length. The first program, BOXPLOTAB, handles this type of multivariate data; it is
an enhancement on an existing graphical technique for exploratory data analysis
known as BOXPLOTS. The program works by appending boxplots as column dividers
in a table of the raw data which originates the box plots. This combination of the raw
data and the graphical representation of that data improves the understanding of the
characteristics of the data in exploratory and descriptive applications; differencing and
tracing of data through the table is also implemented. This thesis also presents and
explores the use of other graphical techniques for exploratory data analysis of
multivariate data such as STAR plots, PROFILE plots, CODED SCATTER plots and
CODED DRAFTSMAN plots. These techniques are examined and implemented in a
series of computer programs which produces these graphical displays. A technical
description of each computer program is presented and user implementation procedures
are discussed. The programs are implemented in APL and run in conjunction with the
experimental IBM APL Graphics program GRAFSTAT. To demonstrate the use of
these techniques, an analysis is conducted on several sets of multivariate data.
Type
Thesis
Description
Series/Report No
Department
Operations Research
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
75 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner.