DATA MINING Desktop Survival Guide by Graham Williams
Desktop Survival Project Home Data Mining Introduction Getting Started Data Loading Data Exploring Data Interactive Graphics Test Descriptive Data Mining Predictive Data Mining Evaluation and Deployment Data Cleaning Handling Missing Data Transforming Data Data Reduction Deployment Troubleshooting Issues Moving into R Beyond Rattle R Getting Help Data Graphics in R Understanding Data Preparing Data Descriptive and Predictive Analytics Issues Evaluating Models Reporting Topics in Data Mining Fraud Analysis Archetype Analysis Text Mining Survival Analysis Algorithms Bagging Bayes Classifier Cluster Analysis Conditional Trees Hierarchical Clustering K-Nearest Neighbours Linear Models Support Vector Machines 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 Appendices Installing Rattle Bibliography Index Preface Goals Organisation Features Audience Typographical Conventions A Note on Languages Currency Acknowledgements

Box and Whisker Plot

A simple box plot of randomly generated data. The box in each plot shows the median (as the line within the box) and one standard deviation from the mean (the extremes of the box). The whiskers show the second standard deviation, and the circles show outliers.

In this code we use R's rnorm function to generate a standard_normal random matrix of the given shape (rows by cols). The dataset is transformed to an R data frame. The x axis is labelled with an appropriate number of letters from the alphabet.

set.seed(2)
ds <- matrix(rnorm(19 * 100), ncol = 19)
pdf("graphics/rplot-boxplot.pdf")
  plot.new()
  plot.window(xlim = c(0, 20), ylim = range(ds), xaxs = "i")
  boxplot(as.data.frame(ds), add = TRUE, at = 1:19)
dev.off()

http://rattle.togaware.com/code/rplot-boxplot.R

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