Delete rows containing specific strings in R

Question

I would like to exclude lines containing a string "REVERSE", but my lines do not match exactly with the word, just contain it.

My input data frame:

   Value   Name      55     REVERSE223        22     GENJJS     33     REVERSE456     44     GENJKI 

My expected output:

   Value   Name      22     GENJJS     44     GENJKI 

Answer 1

This should do the trick:

df[- grep("REVERSE", df$Name),] 

Or a safer version would be:

df[!grepl("REVERSE", df$Name),]