What am I doing wrong here ? And what's the right way to calculate the log differences in a column in a df ?
# first 3 rows of 5000 rows y[1:3,] Date Open High Low Close 1 1983-03-30 29.96 30.51 29.96 30.35 2 1983-03-31 30.35 30.55 30.20 30.24 3 1983-04-04 30.25 30.65 30.24 30.39 #equation in question ...why is this giving zeros ? y1 <- 100*log(y[,5]/(lag(y[,5],1))) # first 10 values from the equation...all zeros head(y1,10) [1] 0 0 0 0 0 0 0 0 0 0 -- View this message in context: http://r.789695.n4.nabble.com/Log-difference-in-a-dataframe-column-tp3221225p3221225.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
