DATA MINING Desktop Survival Guide by Graham Williams
Desktop Survival Project Home Preface List of Figures List of Tables Process . Data Graphics in R Understanding Data Preparing Data Building Models Evaluating Models Algorithms Apriori Bagging Bayes Classifier Boosting Conditional Trees Decision Trees Hierarchical Clustering Kernel Methods K-Means K-Nearest Neighbours Linear Models Logistic Regression Neural Networks Support Vector Machines Text Mining Open Products Borgelt Data Mining Suite R Rattle Weka Closed Products C4.5 Clementine Enterprise Miner Equbits Foresight GhostMiner InductionEngine ODM Statistica Data Miner TreeNet Virtual Predict Appendicies Glossary Bibliography Index

Logical

Objects of type logical take on the values TRUE or FALSE. The basic logical operators include:

!	Not		Less than		Less than or equal to
	Equal to		Greater than		Greater than or equal to
&	And	|	Or	&& ||	Non vectorised versions

> 5 == 4        # FALSE
> 5 != 4 	# TRUE
> ! 1 - 1	# TRUE since 1-1 is 0 and is coerced to FALSE
> TRUE * 2	# 2 since TRUE is coerced to 1.

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