How to make twoway line graph over group in the same figure

[Anagaw Derseh]

Hello colleagues,

How can I make twoway line graph across grouping variable on the same figure?
For instance, when I use the following command, I will get separate graphs by grouping variable. But I want to get all of them in the same figure,

 webuse nlswork.dta
twoway line ln_wage year if (idcode ==1 | idcode ==45 | idcode ==118), by(race)

[Nick Cox]

Perhaps check out xtline and its options or

xtset 
line ln_wage year, c(L)

[Anagaw Derseh]

Thank you so much Nick Cox xtline works for me!!