This must have been there for a while>
In the datasets package, the help for airquality says:
A data frame with 154 observations on 6 variables.
But:
> str(airquality)
'data.frame':??? 153 obs. of? 6 variables:
?$ Ozone? : int? 41 36 12 18 NA 28 23 19 8 NA ...
?$ Solar.R: int? 190 118 149 313 NA NA 299 99 19 194 ...
?$ Wind?? : num? 7.4 8 12.6 11.5 14.3 14.9 8.6 13.8 20.1 8.6 ...
?$ Temp?? : int? 67 72 74 62 56 66 65 59 61 69 ...
?$ Month? : int? 5 5 5 5 5 5 5 5 5 5 ...
?$ Day??? : int? 1 2 3 4 5 6 7 8 9 10 ...
Regards
David Scott
--
_________________________________________________________________
David Scott Department of Statistics
The University of Auckland, PB 92019
Auckland 1142, NEW ZEALAND
Phone: +64 9 923 5055, or +64 9 373 7599 ext 85055
Email: d.scott at auckland.ac.nz, Fax: +64 9 373 7018