DATA MINING Desktop Survival Guide by Graham Williams
Desktop Survival Project Home List of Figures List of Tables Data Mining Data Mining Data Mining with Rattle Introduction Data Transform Explore A Model Building Framework Unsupervised Modelling Two Class Models Multi Class Models Regression Models Text Mining Evaluation and Deployment Moving into R Troubleshooting R for the Data Miner R Data Graphics in R Understanding Data Preparing Data Building Models Evaluating Models Algorithms Apriori Bagging Bayes Classifier Boosting Cluster Analysis Conditional Trees Hierarchical Clustering K-Means K-Nearest Neighbours Linear Models Logistic Regression Neural Networks Support Vector Machines Text Mining Open Products AlphaMiner Borgelt Data Mining Suite KNime R Rattle Weka Closed Products C4.5 Clementine Equbits Foresight GhostMiner InductionEngine ODM Enterprise Miner Statistica Data Miner TreeNet Virtual Predict Appendicies Glossary Bibliography Index

Bar Chart Options

We illustrate some options in drawing bar charts from the lattice package. First a simple plot. We use NO_CONVERSION for r.data_frame so that the data frame retains the column names and for r.barchart so that the barchart can be printed to the device (otherwise it simply returns a data structure of the information).

[width=0.7]rplot-bar-horizontal

library("lattice")
pdf('graphics/rplot-bar-horizontal.pdf')
  dataset <- data.frame(month=c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
                          1, 2, 3, 4),
                        year=c(2004, 2004, 2004, 2004, 2004, 2004, 2004, 2004,
                          2004, 2004, 2004, 2004, 2005, 2005, 2005, 2005),
                        mean=c(3.8, 3.2, 3.4, 3.0, 3.8, 3.2, 3.4, 3.0,
                          3.9, 3.2, 3.4, 3.0, 3.9, 3.2, 3.4, 3.0))
  trellis.par.set(theme=col.whitebg())
  barchart(month ~ mean | year, data=dataset)
dev.off()

http://rattle.togaware.com/code/rplot-bar-horizontal.R

If we add horizontal = False, layout = (1,2) to the call to the r.barchart function, we can rotate the graphics:

[width=0.8]rplot-bar-vertical

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