adding a horizontal line to a graph bar

[Paula de Souza Leao Spinola]

Would anyone know how to add a horizontal line to a graph bar? My y-axis is a % and I would like to add a horizontal line at 15%.
My graph bar command without the horizontal line I would like to add is as follow:

graph bar (mean) d_pc, over(diasem) ytitle("") subtitle("% de Partos Cesáreos por Dia da Semana: 2006-2013")

[Nick Cox]

Just add an extra option

yline(15)

This is documented: in the help for graph bar, click on axis_options.

[Paula de Souza Leao Spinola]

Thank you, Nick.

I did not find an option to bring the horizontal line to the front. The default is the horizontal in the back of the bars. Would you know how to change that?

[Nick Cox]

That sounds like a feature to me. To get other behaviour, I think you would need to recast using twoway as in this case:

sysuse auto, clear

* 1 
graph bar (mean) mpg, over(rep78) yli(23)

collapse mpg, by(rep78)

* 2 
twoway bar mpg rep78, base(0) barw(0.6) || function y = 23, ra(0.7 5.3) ///
yla(0(5)40) legend(off) ytitle(Mean miles per gallon) xtitle(`: var label rep78')

[Deogratious Sebuwufu]

How do i shade an area to the right after drawing an.... xline(20, lwidth(3)).... please advise

[Deogratious Sebuwufu]

How can i do a shading like what i have attached in stata!!! any help please ...

[Nick Cox]

#6 is poorly placed, as the question has nothing to do with the title thread. But see these suggestions thrown up by typing in Stata.

search shading

Blog . . . . . . . . . . . . Adding recession shading to time-series graphs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D. Schenck
2/20 http://blog.stata.com/2020/02/13/add...ssion-shading-
to-time-series-graphs/

SJ-16-3 gr0067 . Speaking Stata: Shading zones on time series and other plots
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
Q3/16 SJ 16(3):805--812 (no commands)
discusses background shading of time series and other plots