DATA MINING Desktop Survival Guide by Graham Williams
Desktop Survival Project Home List of Figures List of Tables Data Mining with Rattle 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 R for the Data Miner 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

Searching for Objects

Objects (data, functions, and methods) are searched for through a search path of packages and datasets. If the object is not found an error is raised. The search function will list the current search path. We add elements to the search path with the XnullXXnullXR functionsR functions (R function)R functionsR libraries (R library)R functionsR option (R option)R functionsR packages (R package)R functionsDatasets (Dataset)XnullXR functionsR functionsattach and library functions and can remove them with the detach function:

> Species
Error: object "Species" not found
> search()
 [1] ".GlobalEnv"        "package:Rcmdr"     "package:car"
 [4] "package:tcltk"     "package:methods"   "package:stats"
 [7] "package:graphics"  "package:grDevices" "package:utils"
[10] "package:datasets"  "RcmdrEnv"          "Autoloads"
[13] "package:base"
> attach(iris)
> search()
 [1] ".GlobalEnv"        "iris"              "package:Rcmdr"
 [4] "package:car"       "package:tcltk"     "package:methods"
 [7] "package:stats"     "package:graphics"  "package:grDevices"
[10] "package:utils"     "package:datasets"  "RcmdrEnv"
[13] "Autoloads"         "package:base"
> Species
  [1] setosa     setosa     setosa     setosa     setosa     setosa
[...]
[145] virginica  virginica  virginica  virginica  virginica  virginica
Levels: setosa versicolor virginica
> detach(iris)
> search()
 [1] ".GlobalEnv"        "package:Rcmdr"     "package:car"
 [4] "package:tcltk"     "package:methods"   "package:stats"
 [7] "package:graphics"  "package:grDevices" "package:utils"
[10] "package:datasets"  "RcmdrEnv"          "Autoloads"
[13] "package:base"

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