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 correctlydata(iris)

# iris3 is first 3 rows of iris

iris3 <- iris[1:3,]

computed

z <- c(F,F,F)

for(i in seq(z)) z[i] <- identical(iris3[1,],iris3[i,])

z

[1] TRUE FALSE FALSEfor(i in seq(z)) z[i] <- identical(iris3[1,],iris3[i,])

z

# this should do the same but is incorrect

apply(iris3,1,function(x)identical(x,iris3[1,]))

1 2 3FALSE 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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Laurent Gautier CBS, Building 208, DTU

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