Re: [R] Creating a data.frame

From: Moshe Olshansky <m_olshansky_at_yahoo.com>
Date: Wed, 13 Feb 2008 21:06:32 -0800 (PST)


Just make d <- data.frame(x,y,z).

cbind forces x,y and z to be of the same type.

> OK...newbie question here.
> Either I'm reading the docs wrong, or I'm totally
> confused.
>
> Given the following:
>
> x<-c("aaa","bbb","ccc")
> y<-rep(0,3)
> z<-rep(0,3)
>
> is.character(x)
> [1] TRUE
>
> is.numeric(y)
> [1] TRUE
>
> Now...I want to create a data frame, but keep the
> data types.
> In reading the docs, I assume you do it this way:
>
> d<-data.frame(cbind(x=I(x),y=y,z=z)
>
> But, when I do str(d), I get the following:
>
> 'data.frame': 3 obs. of 3 variables:
> $ x: Factor w/ 3 levels "aaa","bbb","ccc": 1 2 3
> $ y: Factor w/ 1 level "0": 1 1 1
> $ z: Factor w/ 1 level "0": 1 1 1
>
> I thought the I() prevents character from becoming
> factors, right?
> Secondly, how do I force y and z in the data frame
> to become numeric?
>
> Thanks in advance
> Joe
>
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>



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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. Received on Thu 14 Feb 2008 - 05:15:06 GMT

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