How do I create standard deviation bars for a log reduction graph? My st.dev seems to skew the graph as log reduction was not measured, only three repeats.
Not sure what you mean by "log reduction" (is this about deforestation or logarithms?). If about logarithms, are you trying to plot geometric means with geometric standard deviations? If so, here is the R code code for those bar for variable x: exp(mean(log(x))+c(-1,1)*sd(log(x)))