DATA MINING Desktop Survival Guide by Graham Williams
Desktop Survival Project Home List of Figures List of Tables Data Mining Introduction Data Mining with Rattle Data Exploring Data Transforming Data Cluster Analysis Association Analysis Classification and Regression Models Evaluation and Deployment Issues Moving into R Troubleshooting Beyond Rattle R Data Graphics in R Understanding Data Preparing Data Descriptive and Predictive Analytics Issues Evaluating Models Reporting Cluster Analysis Text Mining Text Mining Algorithms Bagging Bayes Classifier Cluster Analysis Conditional Trees Hierarchical Clustering K-Nearest Neighbours Linear Models Neural Networks 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 Appendicies Installing GTK, R, and Rattle Glossary Bibliography Index

Testing Package Availability

If a function you write depends on the functionality of some package, such as gplots, use the XnullXR functionsR functions (R function)R functionsR libraries (R library)R functionsR option (R option)R functionsR packages (R package)R functionsDatasets (Dataset)R functionsR functionsstopifnot function to exit if the package is not available:

myfun <- function()
{
  stopifnot(require(gplots))
  [...]
}

Also, the XnullXR functionsR functions (R function)R functionsR libraries (R library)R functionsR option (R option)R functionsR packages (R package)R functionsDatasets (Dataset)R functionsR functions.packages can be used to list all packages that have been installed on your system:

> .packages(all=TRUE)
 [1] "acepack"              "ada"                  "amap"                
 [4] "arules"               "bitops"               "butler"              
[..]
[73] "tcltk"                "tools"                "utils"               
[76] "mapdata"

And a call to the XnullXR functionsR functions (R function)R functionsR libraries (R library)R functionsR option (R option)R functionsR packages (R package)R functionsDatasets (Dataset)R functionsR functionslibrary function with no arguments will list all packages installed, and a one line description:

> library()
Packages in library '/usr/lib/R/library':

base                    The R Base Package
datasets                The R Datasets Package
graphics                The R Graphics Package

[...]

Packages in library '/usr/local/lib/R/site-library':

acepack                 ace() and avas() for selecting regression
                        transformations
ada                     Performs boosting algorithms for a binary
                        response

[...]

XML                     Tools for parsing and generating XML within R
                        and S-Plus.
xtable                  Export tables to LaTeX or HTML

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