On 3/3/10, BioStudent <s0975...@sms.ed.ac.uk> wrote: > What i really want to do is write an R script that says "if the ID of > dataset1 and 2 match (2nd row), print out that whole row into a new > dataset3". >
Would this do what you want? > x1 <- iris[1:5,] > x1 Sepal.Length Sepal.Width Petal.Length Petal.Width Species 1 5.1 3.5 1.4 0.2 setosa 2 4.9 3.0 1.4 0.2 setosa 3 4.7 3.2 1.3 0.2 setosa 4 4.6 3.1 1.5 0.2 setosa 5 5.0 3.6 1.4 0.2 setosa > x2 <- iris[4:7,] > x2 Sepal.Length Sepal.Width Petal.Length Petal.Width Species 4 4.6 3.1 1.5 0.2 setosa 5 5.0 3.6 1.4 0.2 setosa 6 5.4 3.9 1.7 0.4 setosa 7 4.6 3.4 1.4 0.3 setosa > x.ids <- intersect(rownames(x1), rownames(x2)) > x.ids [1] "4" "5" > x3 <- cbind(x1[x.ids, ], x2[x.ids, ]) Liviu ______________________________________________ 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.
