June 2007
Beginner to intermediate
950 pages
27h 8m
English
Content preview from The R Book
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Dataframes containing the same variable names
If you have several different dataframes containing the same variable names (say x and y) then the simplest way to ensure that the correct variables are used in the modelling is to name the dataframe in the function call:
model<-lm(y ~ x,data=correct.frame)
The alternative is much more cumbersome to type:
model<-lm(correct.frame$y ~ correct.frame$x)
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.