Combining two graphs and adding the confidence interval

[Eli Omo]

Hi everyone ,


I have plotted these two graphs separately but I would like to combine both graphs to one and include the confidence intervals on the graphs:

Code:
twoway (connected fidelity bpweeks if Category==1 & inrange(bpweeks,20,40), mcol("blue")) /// (connected fidelity bpweeks if Category==4 & inrange(bpweeks,20,40), mcol("purple"))
Code:
twoway (connected fidelity bpweeks if Category==2 & inrange(bpweeks,20,40), mcol("blue")) /// (connected fidelity bpweeks if Category==4 & inrange(bpweeks,20,40), mcol("purple"))
Is that possible?

Any help is greatly appreciated

Thanks

[Tiago Pereira]

Example via -dataex-?