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strato
2009 Oct 26
1
issue with levels of a factor after subsetting
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The variable "Rio" contents names of 43 rivers in Colombia, now my
boss wants me to show just 4 of them in a graph and the other 39 in
another, i subsetted them using the following code:
#The first 4 Rivers
>car4<-car[car$Rio%in%c("Magdalena","Atrato","San Juan","Mira"),]
#The other 39
>car5<-car[!car$Rio%in%c("Magdalena","Sin?","Atrato","San Juan","Mira","Micay",
"Patia","Canal del Dique","Iscuand?","Guapi"),]
An...