Re: [R] Compare two data sets

From: jim holtman <jholtman_at_gmail.com>
Date: Tue, 25 Mar 2008 10:46:53 -0500

Here is how to find the values in common:

> dat1 <- paste('a', 1:6, sep='')
> dat2 <- paste('a', c(2,4:6), sep='')
> # find the data in common
> intersect(dat1, dat2)

[1] "a2" "a4" "a5" "a6"
>

On 3/25/08, amarkey_at_uiuc.edu <amarkey_at_uiuc.edu> wrote:
> I would like to compare two data sets saved as text files (example below) to determine if both sets are identical(or if dat2 is missing information that is included in dat1) and if they are not identical list what information is different between the two sets(ie output "a1", "a3" as the differing information). The overall purpose would be to remove "a1" and "a3" from dat 1 so both dat1 and dat2 are the same.
> My R abilities are somewhat limited so any suggestions are greatly appreciated.
>
> Alysta
>
> dat1
> a1
> a2
> a3
> a4
> a5
> a6
>
> dat2
> a2
> a4
> a5
> a6
>
> ______________________________________________
> R-help_at_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.
>

-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

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Received on Tue 25 Mar 2008 - 17:16:23 GMT

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