r how to calculate inverts in a chart which data frame is used for plotting how to use lme in graphing what r function do you use to check sigma what r method can be used to find the variability in a dataset? how to use r dataset sigma values how do we calculate sigma value in r when is it necessary to log a dataset with sigma in r when using a dataset with a dataset, how is variation calculated and what is it used for? how to calculate sigma on R lme vlog dataset meaning can lme be used in a dataset that contain log values how to calculate sigma in r can i use lme to calculate sigma how to use lme when calculating sigma lme vs logging datasets r calculates between group variation when lme is used to calculate sigma can lme be used with the x data how to find the difference between an a graph and a sigma data frame