Conversation

You need to get the hang of reading the online help. The information required is actually there in ?dotchart --- it's just tersely and obscurely expressed. A certain degree of optimism is required. You need to ***believe*** that the information is there; then ask yourself "What could they possibly mean by what they have written that would tell me what I need to know?".
-- Rolf Turner (on reading the help pages)
R-help (June 2013) #Rstats