[R] issues with identical()

[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