Creating histograms

[Tomas Angelo]

I created a dummy variable to accuse a characteristic which is common in 4 groups in my analyses. How can I draw an histogram, one for each group, which accuses the percentage of that characteristic in that group in a certain year (from 1995 to 2015, for example)?

[Nick Cox]

The percent with a characteristic is just the mean of the corresponding indicator, conventionally multiplied by 100. An analogue is

sysuse auto, clear
graph bar (mean) foreign, over(rep78) yla(0 .25 "25" .5 "50" .75 "75" 1 "100") ytitle(Percent foreign) b1title(Repair record 1978)

[Tomas Angelo]

Thank you!