Line Graph with Mean and Standard Deviations

[Andrew Renick]

Is it possible to draw a Line Graph with the y axis mean and standard deviations drawn on the graph? if so, How?

[Maarten Buis]

We need a more precise description of the graph you want.

Do you want a line graph of means, e.g. for each year the mean number of accidents on a particular section of road, or do you want a line graph of the raw data and add ticks on the y-axis for the mean.

How do you want to include the standard deviation in your plot? Is it supposed to tell us something about the variability? Maybe quantiles would be a more intuitive way of including that information?

[Nick Cox]

Maarten asks good questions. In addition

help serrbar

The examples in the help can easily be extended:

webuse assembly, clear 
serrbar mean std date, scale(2) yline(195)
serrbar mean std date, scale(2) title("Observed Weight Variation") ///
sub("San Francisco plant, 1/8 to 1/6") yline(195) yaxis(1 2) ylab(195, axis(2)) ytitle("", axis(2))

* new here: see addplot() addition 
serrbar mean std date, scale(2) title("Observed Weight Variation") ///
sub("San Francisco plant, 1/8 to 1/6") yline(195) yaxis(1 2) ylab(195, axis(2)) ytitle("", axis(2)) ///
addplot(line mean date) legend(off)

[Bilal Hassan]

Hello Nick Cox
Thank you very much for this code which is very useful for me. May you please share here as to what to do if I want to organize date as a function of ascending/descending order of means?