Re: [R] identify and delete in table

Is this what you want: > ds1 <- read.table(text = "1 A + 2 B + 3 X + 4 AA + 5 A + 6 D + 7 XA + 8 C", as.is = TRUE) > > ds2 <- read.table(text = "1 A + 2 X + 3 A", as.is = TRUE) > > # find matches > ds3 <- ds1[!(ds1$V2 %in% ds2$V2), ] > ds3 V1 V2 2 2 B 4 4 AA 6 6 D 7 7 XA 8 8 C On Mon,

[R] identify and delete in table

Dear all, I want to delete the exact matches in a large dataset based on a smaller dataset. In other words I want to subtract the smaller dataset from the larger one. The smaller dataset is a part of the larger one. The datasets contains hundred of thousands of lines (1 column) and the content