-- Eredeti üzenet -- Feladó: Dévaványai Agamemnón <devavanyai@citromail.hu>Címzett: r-hel@r-project.org, r-hel@r-project.orgElküldve: 2010. július 29. 16:29Tárgy : duplicates Sorry! I try it again Dear R Users! I have a dataframe with duplicatecases. Var1 duplicated by var2. var1 var2 var3 var4 var5 1 4 500 1 2 1 3 200 2 5 1 8 125 1 9 2 2 120 2 52 2 6 22 1 20 2 9 400 1 22 3 1 100 2 8 3 2 200 5 40 4 8 20 1 60 I want to delete duplicate ones from var1 which have low rank at var2, and keep that case which has highest rank at var2. I would like to keep the Whole row (with the other variables: var1 var2 var3 var4 var5 1 8 125 1 9 2 9 400 1 22 3 2 200 50 40 4 8 200 1 60 Thanks Ag [[alternative HTML version deleted]]
Does this works? (Untested)
library(plyr)
ddply(your_dataframe, "var1", function(x){
x[which.max(x$var2), ]
})
----------------------------------------------------------------------------
ir. Thierry Onkelinx
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> -----Oorspronkelijk bericht-----
> Van: r-help-bounces at r-project.org
> [mailto:r-help-bounces at r-project.org] Namens D?vav?nyai Agamemn?n
> Verzonden: donderdag 29 juli 2010 16:31
> Aan: r-help at r-project.org
> Onderwerp: [R] Fwd: duplicates
>
>
>
> -- Eredeti ?zenet --
> Felad?: D?vav?nyai Agamemn?n
> <devavanyai at citromail.hu>C?mzett: r-hel at r-project.org,
> r-hel at r-project.orgElk?ldve: 2010. j?lius 29. 16:29T?rgy : duplicates
>
> Sorry!
> I try it again
>
> Dear R Users!
>
>
> I have a dataframe with duplicatecases. Var1 duplicated by var2.
>
>
>
> var1 var2 var3 var4 var5
> 1 4 500 1 2
> 1 3 200 2 5
> 1 8 125 1 9
> 2 2 120 2 52
> 2 6 22 1 20
> 2 9 400 1 22
> 3 1 100 2 8
> 3 2 200 5 40
> 4 8 20 1 60
>
> I want to delete duplicate ones from var1 which have low rank
> at var2, and keep that case which has highest rank at var2. I
> would like to keep the Whole row (with the other variables:
>
> var1 var2 var3 var4 var5
> 1 8 125 1 9
> 2 9 400 1 22
> 3 2 200 50 40
> 4 8 200 1 60
>
> Thanks Ag
>
> [[alternative HTML version deleted]]
>
>
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Hi rather complicated one liner assuming your data frame has name test do.call(rbind,lapply(split(test,test$var1), function(x) x[which.max(x[,"var2"]),])) Here it is in 3 lines test.s <- split(test,test$var1) # splits data frame result <- lapply(test.s, function(x) x[which.max(x[,"var2"]),]) # chose maximum value from var2 and selects corresponding row do.call(rbind, result) # put evereything into one data frame again There could be issues if you had NA values in var1 or var2 Regards Petr r-help-bounces at r-project.org napsal dne 29.07.2010 16:31:06:> > > -- Eredeti ??zenet -- > Felad??: D??vav??nyai Agamemn??n<devavanyai at citromail.hu>C??mzett: r-> hel at r-project.org, r-hel at r-project.orgElk??ldve: 2010. j??lius 29.16:29T??rgy> : duplicates > > Sorry! > I try it again > > Dear R Users! > > > I have a dataframe with duplicatecases. Var1 duplicated by var2. > > > > var1 var2 var3 var4 var5 > 1 4 500 1 2 > 1 3 200 2 5 > 1 8 125 1 9 > 2 2 120 2 52 > 2 6 22 1 20 > 2 9 400 1 22 > 3 1 100 2 8 > 3 2 200 5 40 > 4 8 20 1 60 > > I want to delete duplicate ones from var1 which have low rank at var2,and> keep that case which has highest rank at var2. I would like to keep theWhole> row (with the other variables: > > var1 var2 var3 var4 var5 > 1 8 125 1 9 > 2 9 400 1 22 > 3 2 200 50 40 > 4 8 200 1 60 > > Thanks Ag > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html> and provide commented, minimal, self-contained, reproducible code.
Hi, Please try ?rle t.x <- x[order(x[,1],x[,2]),] t.x[cumsum(rle(t.x[,1])$lengths),] ----- A R learner. -- View this message in context: http://r.789695.n4.nabble.com/Fwd-duplicates-tp2306555p2306617.html Sent from the R help mailing list archive at Nabble.com.