動作環境
RStudio @ rollapp
R version 3.3.0
rep()という繰返しの関数。
> y<-c("zun","zun","doko")
> rep(y,3)
[1] "zun" "zun" "doko" "zun" "zun" "doko" "zun" "zun"
[9] "doko"
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