..hey thanks for the answer, both of you... but :-(, I don't seem to have an answer to my problem... I tried with what u suggested, but it doesn't work yet... so I will precise it... I have a data frame... and I would like to apply the function "prediction" which acts on two vectors prediction(linear,ind), to my data frame,I mean to all the rows of my data frame... something like a function "Map" in Mathematica... Shortly, I want to apply function "prediction" to a list of arguments, not to a single argument... I hope now it is more clear... Thanks for the answers once more, best regards, ana ______________________________________________________________________ Original poruka Od: Peter Dalgaard BSA <p.dalgaard at biostat.ku.dk> Za: Spencer Graves <spencer.graves at pdf.com> Tema: Re: [R] how to use apply with a function created by ourselfs...? Primljena: 20 Apr 2003 22:31:52 Spencer Graves <spencer.graves at pdf.com> writes:
By default, arithmetic in R is vectorized, with a scalar being a
vector of length 1.
Consider the following example:
prediction <- function(a, b)
{
a+b
}
> prediction(1:3, 4:6)
[1] 5 7 9 hope this helps, spencer graves
Not sure that was the question... If something else was meant, the
answer might be
lapply(v,prediction,b=5)
or
do.call("prediction",as.list(v))
Rephrasing the question might help...
--
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c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
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