So say,
x <- c("aa/bb:cc/dd", "aa/cc:cc/dd", "aa/cc:aa/ee")
y <- c("aa")
now I need to count the substring "aa" along the row it should give me the count irrespective if it is present as two times. eg: aa= 3 not 4
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You could use `sum(grepl(y, x))` or `sum(grepl(y, x, fixed=TRUE))` for a bit of a speed boost in this case. – lmo Jun 19 '17 at 19:56
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Ya its working for this but if I have to identify for multiple things like "aa", "bb" together do we have any option. Mine is in a dataframe as well. – R_to_kn Jun 19 '17 at 20:54
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You should spend some time learning the basics of regular expressions. It will be worth the effort. I like this site: http://www.regular-expressions.info/. – lmo Jun 20 '17 at 11:31