r - Episode count for each row -


i'm sure has been asked before life of me can't figure out search for!

i have following data:

x y 1 3 1 3 1 3 1 2 1 2 2 2 2 4 3 4 3 4

and output running count resets everytime either x or y changes value.

x y o 1 3 1 1 3 2 1 3 3 1 2 1 1 2 2 2 2 1 2 4 1 3 4 1 3 4 2

try like

df<-read.table(header=t,text="x y 1 3 1 3 1 3 1 2 1 2 2 2 2 4 3 4 3 4") cbind(df,o=sequence(rle(paste(df$x,df$y))$lengths)) > cbind(df,o=sequence(rle(paste(df$x,df$y))$lengths)) x y o 1 1 3 1 2 1 3 2 3 1 3 3 4 1 2 1 5 1 2 2 6 2 2 1 7 2 4 1 8 3 4 1 9 3 4 2

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