is.numeric (PR#8067)

Please do read the help page before firing off a bug report, as we do ask 
in several places.  It says

      'is.numeric' returns 'TRUE' if its argument is of type numeric or
      type integer and 'FALSE' otherwise.

and

typeof(NaN)

[1] "double"

(numeric and double are synonyms for types).

Working as documented is a not a bug.

Full_Name: Joern Toedling
Version: 2.1.0

We do ask for reports to be made on the current version of R.

OS: Linux
Submission from: (NULL) (193.62.198.2)


Maybe, it's supposed to be a feature rather than a bug, but I find it quite
strange that

is.numeric(NaN)

returns TRUE, when NaN means 'Not a Number'

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595