string-substitution

Replace specific characters within strings

With a regular expression and the function gsub(): group <- c(“12357e”, “12575e”, “197e18”, “e18947”) group [1] “12357e” “12575e” “197e18” “e18947” gsub(“e”, “”, group) [1] “12357” “12575” “19718” “18947” What gsub does here is to replace each occurrence of “e” with an empty string “”. See ?regexp or gsub for more help.

How to convert string rule to an expression which has a range in R [closed]

I’d do it in several steps: Split on logical operators into separate inequalities. Change double inequalities like -3>x1>=-1.45 into two inequalities. Change “=” to “==”, and put it all together. For example: a1 <- strsplit(a, “&”, fixed = TRUE)[[1]] a1a <- gsub(” “, “”, a1) # get rid of spaces a2 <- gsub(“([-0-9.]+[<>=]+)([[:alpha:]]+[[:alnum:]]*)([<>=]+.+)”, “\\1\\2 & … Read more