Hallo I am confused, maybe others know what do you want but could you be more specific?
Let say you have such data set.seed(123) Var.1 = rep(LETTERS[1:4], 10) Var.2 = sample(1:40, replace=FALSE) data = data.frame(Var.1, Var.2) What should be the desired outcome? You can sort data <- data[order(data$Var.2, decreasing=TRUE), ] and split the data > split(data$Var.2, data$Var.1) $A [1] 38 35 32 31 30 22 11 8 2 1 $B [1] 39 28 25 23 16 15 7 6 5 4 $C [1] 40 36 29 26 21 19 18 14 10 9 $D [1] 37 34 33 27 24 20 17 13 12 3 T inspect highest values. But here I am lost. As C is first and fourth biggest value, you follow third option and select 3 highest A, 3B 2C and 2D? Or I do not understand at all what you really want to achieve. Cheers Petr > -----Original Message----- > From: R-help <r-help-boun...@r-project.org> On Behalf Of Silvano Cesar da > Costa > Sent: Thursday, August 19, 2021 10:40 PM > To: r-help@r-project.org > Subject: [R] Selecting elements > > Hi, > > I need to select 15 elements, always considering the highest values > (descending order) but obeying the following configuration: > > 3A - 4B - 0C - 3D or > 2A - 5B - 0C - 3D or > 3A - 3B - 2C - 2D > > If I have, for example, 5 A elements as the highest values, I can only choose > (first and third choice) or 2 (second choice) elements. > > how to make this selection? > > > library(dplyr) > > Var.1 = rep(LETTERS[1:4], 10) > Var.2 = sample(1:40, replace=FALSE) > > data = data.frame(Var.1, Var.2) > (data = data[order(data$Var.2, decreasing=TRUE), ]) > > Elements = data %>% > arrange(desc(Var.2)) > > Thanks, > > Prof. Dr. Silvano Cesar da Costa > Universidade Estadual de Londrina > Centro de Ciências Exatas > Departamento de EstatÃstica > > Fone: (43) 3371-4346 > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting- > guide.html > and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
