Hello Mr. Xu, I would like to ask a very basic question. When I use your gsynth package, I get a lot of NA values in the out (there are no missing values in my raw data), how can I fix it?
pdf("sim_att.pdf",width=10,height=7)
true.effect<-matrix(data$eff,30,50)[,1:5]
Error in matrix(data$eff, 30, 50) :
'data' must be of a vector type, was 'NULL'
Hello Mr. Xu, I would like to ask a very basic question. When I use your gsynth package, I get a lot of NA values in the out (there are no missing values in my raw data), how can I fix it?![image](https://user-images.githubusercontent.com/98133663/186880672-322d23cc-a206-480a-a408-acffe06ee73a.png)