January 2009
Beginner
264 pages
8h 12m
English
Content preview from Computational Statistics
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A-198 R AS A PROGRAMMING LANGUAGE AND ENVIRONMENT
Special Constants
(cont.)
Inf infinite. Implementation dependent.
Should follow the IEEE Standard 754. Type: numeric.
Example: 1/0
Test Functions
is.na() returns TRUE if the argument has the value NA or NaN.
na.omit() returns an object with the cases containing NA removed.
na.fail() returns its argument if no the case contains NA ; signals an error mes-
sage otherwise.
is.nan() returns TRUE if the argument has the value NaN.
is.inf() returns TRUE if the argument has the value Inf or -Inf.
OUTPUT FOR OBJECTS ...
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