[R] apply problem

[Laurent Gautier]

On Sat, Mar 16, 2002 at 11:58:51PM -0500, ggrothendieck at yifan.net wrote:
> 
> > data(iris)
> 
> # iris3 is first 3 rows of iris
> > iris3 <- iris[1:3,]
> 
> # z compares row 1 to each row of iris3 and is correctly 
> computed
> > z <- c(F,F,F)
> > for(i in seq(z)) z[i] <- identical(iris3[1,],iris3[i,])
> > z
> [1]  TRUE FALSE FALSE
> 
> # this should do the same but is incorrect
> > apply(iris3,1,function(x)identical(x,iris3[1,]))
>     1     2     3 
> FALSE FALSE FALSE 
> 
> What's wrong here?
> 
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Could this be because 'apply' expects an 'array' as input (try 'help(apply)') ?



Hopin' it helps,





Laurent





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