Hi Henrique,
Much thanks (obrigado!!!) for your quick answer,
I have built a function from you suggestions that took the following script:
teste=function(...){
df_out = matrix(0, ncol=ncol(..1), nrow=nrow(..1));
for(i in 1:ncol(..1)){
df_out[,i] = apply(do.call("rbind", lapply(list(...), "[[", i)), 2, median);
return(df_out)
}
}
When I applied it to 4 matrices just gave:
x v
1 1 0
2 1 0
3 1 0
4 1 0
5 1 0
6 1 0
It seems there is a problem here.
Any re-suggestion?
All the best,
Diogo André Alagador
Portugal
From: Henrique Dallazuanna [mailto:[EMAIL PROTECTED]
Sent: segunda-feira, 22 de Outubro de 2007 17:31
For: Diogo Alagador
Cc: r-help@r-project.org
: Re: [R] median value dataframe coming from multiple dataframes
Perhaps:
[[1]]
x v
1 1 1.0565171
2 2 -0.8273003
3 3 1.0614944
4 4 2.6897433
5 5 0.7371014
6 6 -1.3192476
[[2]]
x v
1 1 1.7267265
2 2 -0.2470332
3 3 -0.1667343
4 4 -0.4970180
5 5 -1.0597913
6 6 0.3742491
[[3]]
x v
1 1 1.3846207
2 2 0.7995231
3 3 -0.6818515
4 4 0.4711960
5 5 1.9666241
6 6 -0.1185372
[[4]]
x v
1 1 -1.6236832
2 2 0.9617151
3 3 1.1262914
4 4 0.2224509
5 5 1.2749641
6 6 -0.2390259
df_out <- matrix(0, ncol=ncol(df1), nrow=nrow(df1))
for(i in 1:ncol(df1)){
df_out[,i] <- apply(do.call("rbind", lapply(list(df1, df2, df3, df4), "[[",
i)), 2, median)
}
On 22/10/2007, Diogo Alagador <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> >
wrote:
Hi all,
I am not a skillful R programmer and has I am handling with large
dataframes (about 30000 x 300) I am in need of an efficient function.
I have 4 dataframes with the same dimension. I need to generate other
dataframe with the some dimension than the others where in each position it has
the median value of the 4 values in the same position coming from the 4
dataframes.
Grateful by your support,
Diogo André Alagador
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--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
