On 8/11/2007, at 4:26 PM, envisage wrote:
> hi, I am reading Modern Applied Statistics with S 4th ed。
> page4 have these two lines:
>> library(MASS)
>> data(chem) # needed in R only
> but I find withou the line " data(chem)"
> I can still access chem, isn't it?
> is it unnecessary or something i missed here?
> thanks for the replay in advance.
I don't think you're missing anything. It appears that things have
changed
and that ``chem'' has become what Prof. Ripley refers to as a ``first
class
object'' in the MASS package. That is it's ``there''.
If you start R and execute
library(MASS)
ls(2)
you will see ``chem'' amongst the names listed.
cheers,
Rolf Turner
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