Count number of rows matching a criteria

Question

I am looking for a command in R which is equivalent of this SQL statement. I want this to be a very simple basic solution without using complex functions OR dplyr type of pa

Answer 1

grep command can be used

CA = mydata[grep("CA", mydata$sCode, ]

nrow(CA)

Answer 2

to get the number of observations the number of rows from your Dataset would be more valid:

nrow(dat[dat$sCode == "CA",])