See How Graphics Reveal Information
Graphical Data Analysis with R shows you what information you can
gain from graphical displays. The book focuses on why you draw graphics
to display data and which graphics to draw (and uses R to do so). All
the datasets are available in R or one of its packages and the R code is
available at rosuda.org/GDA.
Graphical data analysis is useful for data cleaning, exploring data
structure, detecting outliers and unusual groups, identifying trends and
clusters, spotting local patterns, evaluating modelling output, and
presenting results. This book guides you in choosing graphics and
understanding what information you can glean from them. It can be used
as a primary text in a graphical data analysis course or as a supplement
in a statistics course. Colour graphics are used throughout.