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



运行之后出现
matrix __000001 not found
求问怎么解决？？
附件：