vector of ASCII characters to a equal length vector of ASCII
  integers.## S3 method for class 'default}(ch, ...)':
charToIntundefined
- ch{A
character vector.}
  - ...{Not used.}
Returns an ASCII character vector. 
[object Object]
i <- charToInt(unlist(strsplit("Hello world!", split=NULL)))
  # Gives: 72 101 108 108 111  32 119 111 114 108 100  33
  ch <- intToChar(c(72,101,108,108,111,32,119,111,114,108,100,33))
  # Gives: "H" "e" "l" "l" "o" " " "w" "o" "r" "l" "d" "!" 
intToChar()character