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

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 attach 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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