RE: [R] issues with identical()

From: Liaw, Andy <andy_liaw_at_merck.com>
Date: Sat 21 May 2005 - 02:32:35 EST


> d1 <- data.frame(x=1:3, y=4:6)
> d2 <- data.frame(x=1:3, z=4:6)
> d3 <- data.frame(x=1:3, y=4:6)
> identical(d1, d2)

[1] FALSE
> identical(d1, d3)

[1] TRUE Andy

> From: Jean Eid
>
> Hi all, hope you having a nice day,
>
> I ahve this weird results with identical (probably I am not
> understanding
> correctly what it does ...)
>
> I have these two data frames and I issue :
> > identical(temp, temp1)
> [1] FALSE
>
>
> However, these data frames are Nx2 and when I issue:
> > identical(temp[,2], temp1[,2])
> [1] TRUE
> > identical(temp[,1], temp1[,1])
> [1] TRUE
>
> and the results from str
>
>
> > str(temp)
> `data.frame': 7072 obs. of 2 variables:
> $ pub_id : int 10000 1000 10001 10002 10003 10004 10005 10006 10007
> $ faminc90: int -2 5998 19900 43000 35000 40000 56538 61000
> 36000 39105

> > str(temp1)
> `data.frame': 7072 obs. of 2 variables:
> $ pub_id: int 10000 1000 10001 10002 10003 10004 10005
> 10006 10007 10008
> $ faminc: int -2 5998 19900 43000 35000 40000 56538 61000
> 36000 39105
>
> The question is why are the objects different. How else can I
> tell what is
> the difference
>
>
> Thank You
>
> Jean
>
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>



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat May 21 03:12:47 2005

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