search for: 273633

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2012 Mar 20
2
Unique in DataFrame
...e doubt, and I do not think that the way I solve the problem is the best way to do it. The following is a small dataset x<-data.frame(city="Barcelona",sales=253639) x<-rbind(x,data.frame(city="Madrid",sales=223455)) x<-rbind(x,data.frame(city="Lisbon",sales=273633)) x<-rbind(x,data.frame(city="Madrid",sales=266535)) x<-rbind(x,data.frame(city="Barcelona",sales=258369)) x<-rbind(x,data.frame(city="Lisbon",sales=273633)) x<-rbind(x,data.frame(city="Barcelona",sales=22579)) x<-rbind(x,data.frame(city="...
2003 Feb 01
2
Re-assigning vector elements based on their initial values.
Is there an eloquent solution to re-assign vector element values? I have a vector which contains chemical data, some of them are "flagged" as non-detected values by their negative values. I can find the statistics on the positive values in vector "v" simply by typing: >v<- c(5,5,-3,-3,7,8,10) > v[(v>0)] [1] 5 5 7 8 10 I can also convert to positive values by