Le vendredi 13 avril 2012 à 06:09 -0700, arunkumar1111 a écrit : > Hi > > I've a dataset with record A = 100,200,300,400... > > There will be a parameter n. say n=10 means i have add 10% of previous > value to the current row > > current_Val New_value > 100 100 > 200 210 (200+10) > 300 330( 300 +20+10) > 400 460 (400+30+20+10) > > I'm using a loop > But i want takes a long time. Please help One solution is: A <- 1:4 * 100 A + cumsum(c(0, A[-length(A)]) * 0.1) [1] 100 210 330 460
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