Using grep in R to delete rows from a data.frame

Question

I have a dataframe such as this one:

    d <- data.frame(cbind(x=1, y=1:10,    z=c(\"apple\",\"pear\",\"banana\",\"A\",\"B\",\"C\",\"D\",\"E\",\"F\",\"G\"         


        

Answer 1

For completeness, since R 3.3.0, grep and friends come with an invert argument:

new_d <- d[grep("K", d$z, invert = TRUE)]