Hi, sorry, the correct commands should look like this: > plot(example.df$StartDate[ (row(example.df)%%5)==0 ], example.df$DSR1[ (row(example.df)%%5)==0 ], type="p", ylim=c(0.3,0.9)) > points(example.df$StartDate[ (row(example.df)%%5)==0 ], example.df$DSR2[ (row(example.df)%%5)==0 ], type="p", pch=3)
(In my previous mail I had the "points" twice) Kind regards, Kimmo ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.