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Hello, What is the best way of solving this problem? answer <- ifelse(tf=TRUE, i * 5, previous answer) where as an initial condition tf[1] <- TRUE For example if, tf <- c(T,F,F,F,T,T,F) over i = 1 to 7 then the output of the function will be answer = 5 5 5 5 25 30 30 Thank you. Phil,

Hello, I was wondering if anybody could help me with this? I have plotted an acf function for a time series and am very happy with it. Now I am interested in calculating for myself the two values for the confidence intervals that are plotted on the graph of the acf. The confidence intervals do not appear to be returned from the acf function (is this true?). So far I haven't managed to

Hello, Could anybody help me with this question? Example data frame NAME TICKER SHARES PERFORMANCE John ABC 100 0.05 John ABC 1000 1.5 Alice EFG 20 0.3 Paul HIJ 50 1.0 Paul JKL 60 2.0 Paul MNO 12 3.0 I would like to aggregate this dataframe by