Hi Everyone,

I am trying to replicate the synthetic control method implemented by Abadie,Diamond, and Hainmueller.
I am using the following commands:

use "synth_smoking.dta"

tsset state year


synth cigsale beer lnincome retprice age15to24 cigsale(1988) cigsale(1980) cigsale(1975), trunit(3) trperiod(1989) xperiod(1980(1)1988) nested



Later I do placebo test using the following command:

tempname resmat
forvalues i = 1/4 {
synth cigsale retprice cigsale(1988) cigsale(1980) cigsale(1975) , trunit(`i') trperiod(1989) xperiod(1980(1)1988) keep(test`i')
matrix `resmat' = nullmat(`resmat') \ e(RMSPE)
local names `"`names' `"`i'"'"'
}
mat colnames `resmat' = "RMSPE"
mat rownames `resmat' = "names"
matlist `resmat' , row("Treated Unit")


and I get the results but I do not know how to plot the results. Could anyone help me with plotting the results of the placebo test in a single graph?

I am not a native English speaker and also am new to Stata and econometrics; I am sorry if I used wrong terminology.

Thank you very much!