Bug in "transform"?
On Tue, 2 Dec 2008, hadley wickham wrote:
The underlying issue is actually not in transform() but in data.frame():
aq <- airquality[sample(1:153,6),] data.frame(aq, list(a=1,b=2))
Error in data.frame(aq, list(a = 1, b = 2)) : arguments imply differing number of rows: 6, 1
data.frame(aq, list(a=1))
Ozone Solar.R Wind Temp Month Day a 3 12 149 12.6 74 5 3 1 31 37 279 7.4 76 5 31 1 34 NA 242 16.1 67 6 3 1 65 NA 101 10.9 84 7 4 1 59 NA 98 11.5 80 6 28 1 133 24 259 9.7 73 9 10 1
Is this a bug or a "feature"?
As documented: Objects passed to data.frame should have the same number of rows, but atomic vectors, factors and character vectors protected by I will be recycled a whole number of times if necessary. How did you manage to miss that in the help page?
Hadley -- http://had.co.nz/
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