Convert String to Upper Case
string <- "lower case"
up <- toupper(string)
up
## [1] "LOWER CASE"
Convert String to Lower Case
string <- "UPPER CASE"
low <- tolower(string)
low
## [1] "upper case"
string <- "lower case"
up <- toupper(string)
up
## [1] "LOWER CASE"
string <- "UPPER CASE"
low <- tolower(string)
low
## [1] "upper case"