Hello Gerit mutate(MinValue = min(Value[Value != 0]) ) or mutate(MinValue = sort(unique(Value))[2]) only mutates one value which is 100, it doesnt mutate minimum Value != 0 per group by element
On Tuesday, May 11, 2021, 01:26:49 PM GMT+2, Gerrit Eichner <gerrit.eich...@math.uni-giessen.de> wrote: Homework? Try maybe mutate(MinValue = min(Value[Value != 0]) ) or mutate(MinValue = sort(unique(Value))[2]) Hth -- Gerrit --------------------------------------------------------------------- Dr. Gerrit Eichner Mathematical Institute, Room 212 gerrit.eich...@math.uni-giessen.de Justus-Liebig-University Giessen Tel: +49-(0)641-99-32104 Arndtstr. 2, 35392 Giessen, Germany http://www.uni-giessen.de/eichner --------------------------------------------------------------------- Am 11.05.2021 um 13:11 schrieb Elahe chalabi via R-help: > Hi all, > > I have the following data frame > > > dput(df) > structure(list(Department = c("A", "A", "A", "A", "A", "A", "A", > "A", "B", "B", "B", "B", "B", "B", "B", "B"), Class = c(1L, 1L, > 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L), Value = c(0L, > 100L, 800L, 800L, 0L, 300L, 1200L, 1200L, 0L, 0L, 400L, 400L, > 200L, 800L, 1200L, 1200L)), class = "data.frame", row.names = c(NA, > -16L)) > > > I would like to group by "Department" and "Class" and repeat the minimum > value of "Valule" excluding zeros or get the second minimum value. The > desired output is: > > > dput(df) > structure(list(Department = c("A", "A", "A", "A", "A", "A", "A", > "A", "B", "B", "B", "B", "B", "B", "B", "B"), Class = c(1L, 1L, > 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L), Value = c(0L, > 100L, 800L, 800L, 0L, 300L, 1200L, 1200L, 0L, 0L, 400L, 400L, > 200L, 800L, 1200L, 1200L), MinValue = c(100L, 100L, 100L, 100L, > 300L, 300L, 300L, 300L, 400L, 400L, 400L, 400L, 200L, 200L, 200L, > 200L)), class = "data.frame", row.names = c(NA, -16L)) > > > how should I change the following dplyr to give me the desired output? > > > df <- > df %>% > group_by(Department,Class) %>% > mutate(MinValue=min(Value) ) > > > Thanks for any help. > Elahe > > ______________________________________________ > 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. ______________________________________________ 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.
