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

Folders and Files

> getwd()			# Identify the current default working directory
> setwd("h:/work/")		# Change the current default working directory
> file.exists("filename")	# Returns TRUE if the file exists
> unlink("filename")            # Deletes the file or directory
> fname <- file.choose()        # An interactive file chooser.
> choose.dir()			# 
> dir <- tclvalue(tkchooseDirectory()) # GUI which requires library(tcltk).

MS/Windows paths use the backward slash to separate components. This is a problem since the backslash is used as a standard mechanism for introducing special characters within strings. Thus, R requires a double back slash or will seamlessly allow the use of the forward slash. A useful utility on a MS/Windows environment, where backslashes are used in paths, and R likes to have forward slashes, is the following (Duncan Golicher, 5 Jan 2006, r-help):

setwd.clip <- function()
{
  options(warn=-1)
  setwd(gsub("\\\\", "/",readLines("clipboard")))
  options(warn=0)
  getwd()
}

Then, simply select a path into your clipboard (Ctrl-C), then in R call setwd.clip!

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