From: A systematic review and meta-analysis of dietary fat effects on reproductive performance of sows and growth performance of piglets
madata<-read.csv("F:/Meta/filename.csv",header = T)
library (meta)
m.res<-metacont (Ne,Me,Se,Nc,Mc,Sc,data=madata,studlab=paste (Reference),
comb.fixed=F,comb.random=T, method.tau="SJ",
hakn=T, sm="SMD")
m.res
forest(m.res, test.overall.random =T)