Bug in "transform"?
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"? Hadley