help about the function of semi-colon!

General
1

Hello! I'm a new learner of R, and I have a question about a piece of code I was learning about:

>X<-data.frame("var1"=sample(1:5), "var2"=sample(6:10), "var3"=sample(11:15))
> X<-X[sample(1:5),]; X$var2[C(1:3)]= NA

what would be the function of the semi-colon next to X[sample(1:5),]?

Thanks for your answers in advance!

2

Hi!

If you have two valid R expressions, say expr1 and expr2, then these two are equivalent:

expr1
expr2

&

expr1; expr2

So, basically it acts as a line separator so that R evaluates two expressions one after another. It itself adds not much value.

If I may suggest, don't use it.

2 Likes
3

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.