Where did R come from? Primitive Data Types in R R Language Fundamentals Data Types and Basic Maniuplation Steven Buechler Department of Mathematics…

This R tutorial provides a condensed introduction into the usage of the R environment and its utilities for general data analysis and clustering….

1.3 R and statistics. Our introduction to the R environment did not mention statistics, yet many people use R as a statistics system. We prefer to think of it of an ……

In R, missing values are represented by the symbol NA (not available). Impossible values (domain errors like division by 0 et logs of negative numbers are represented ……

Missing values in analysis. In some R functions, one of the arguments the user can provide is the na.action. For example, if you look at the help for the lm command ……

DESCRIPTION WITH EXAMPLES WORKING WITH UNKNOWN VALUES > isUnknown(x=xFac) [1] FALSE FALSE FALSE FALSE TRUE FALSE > isUnknown(x=xFac, unknown=0) [1] TRUE FALSE ……

‘Not Available’ / Missing Values Description. NA is a logical constant of length 1 which contains a missing value indicator. NA can be coerced to any other vector ……