I have two data.frames: "a" and "df"
a <- data.frame(x=seq(13,37,1),rep(c(1,2,3,4,5),each=5),seq(21,105,21))
colnames(a)<-c("values","date","term")
b<-data.frame(x,21,42,63,84,105)
colnames(b)<-c("date","term21","term42","term63",...
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27.01.2016 / 19:14