On 13-May-10 23:43:58, yjmha69 wrote: > Hi there, > >>library(faraway) >>pima > > pregnant glucose diastolic triceps insulin bmi diabetes age test > 1 6 148 72 35 0 33.6 0.627 50 1 > 2 1 85 66 29 0 26.6 0.351 31 0 > >>data(pima) >>pima > > pregnant glucose diastolic triceps insulin bmi diabetes age test > 1 6 148 72 35 0 33.6 0.627 50 1 > 2 1 85 66 29 0 26.6 0.351 31 0 > > As you can see, I can already use pima without running data(pima), > after running data(pima), it looks the same. So what's the reason to > use data(pima) ? > > Thanks > YJM
The difference is that data(pima) will load the dataset pima (which can be found in the package "faraway") without the use of library(faraway). It won't load anything else from faraway. When you use library(faraway) you will load everything in the package faraway, including of course the dataset pima (which is why you see no difference, since that dataset is the same whichever way you load it). So with data() you put less load on your system, and also avoid possible conflicts between what you already have in your environment and what would be brought in when you do library(faraway). Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <ted.hard...@manchester.ac.uk> Fax-to-email: +44 (0)870 094 0861 Date: 14-May-10 Time: 10:35:15 ------------------------------ XFMail ------------------------------ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
