Combine two plots in one graph using ciplot

I would like to plot the means and confidence intervals of two variables into one graph. I used ciplot to do this for only one variable, but for two this code is not working.

On the internet I found that you could combine the plots as follows:

ciplot relative_ambition12 relative_ambition22, by(quota) 

However, if I run this I get the error:

no observations found

At the same time both of the following do produce graphs:

ciplot relative_ambition12, by(quota) 

ciplot relative_ambition22, by(quota) 

Does anyone know how I can combine these two graphs into one?

1 Answer

The community-contributed command ciplot expects to work on the same set of observations for all variables specified in varlist.

For example, the following works:

. sysuse auto, clear . generate price2 = price + 500 . ciplot price price2, by(foreign) 

However, the following does not:

. replace price2 = . if foreign == 1 . ciplot price price2, by(foreign) no observations r(2000); 

Both plots can be graphed separately (i.e. if one variable at a time is specified).

When you have different sets of observations, you can use the inclusive option to produce the desired output to the extent possible:

. ciplot price price2, by(foreign) inclusive