Standard deviation lines for xtline graph

[Emily Huang]

I am wondering how to add standard deviation lines to a timeseries graph I made (xtline)

I calculated the standard deviation already, just unsure of how to plot as upper and lower error bars to the main value of interest.

collapse (mean) adhpc = adhpc (sd) sdadhpc=adhpc, by(subject1 visitdate1)

xtset subject1 visitdate1

xtline adhpc sdadhpc, legend(off)

[Emily Huang]

I'm also interested in how to add a mean trend line if that is possible in stata.

I think I figured out how to do this using tssmooth
There is a YouTube video: https://www.youtube.com/watch?v=KRhroFkSviw

[Roman Mostazir]

I often use 'lgraph' program written by Timothy Mak avoiding 'collapse':

//Install lgraph program
ssc install lgraph

lgraph adhph visitdat1, err(sd)