Hi,
have anybody a hint how i could avoid the cumbersome way (..especially
the value part)
change the data representation from n column data.frame to an stacked
representation.
many thanks
Christian
#example data
dfw <- as.data.frame(matrix(runif(10*10),ncol=10))
dfw$group <- sample(c("X","Z"),nrow(dfw),replace=T,prob=c(0.75,0.25))
# change
var <- rep(names(dfw)[-length(dfw)],nrow(dfw))
group <- rep(dfw$group,nrow(dfw))
#cumbersome
value <- vector()
z=1
for(i in 1:(length(dfw)-1)){
for(j in 1:nrow(dfw)){
value[z] <- dfw[j,i]
z=z+1
}
}
dfr <- cbind(var,group,value)
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