Place this in your `~/.nanorc` for great R syntax highlighting in the only console editor I can be bothered to learn. Thanks to the author and editor for providing it in the first place.

.nanorc

############################################
#  Syntax highlighting for R               #
#  by Stephen Haptonstahl                  #
#  March 15, 2009                          #
#  http://srh.ucdavis.edu/drupal/node/20   #
#  edited by Mike Miller                   #
#  Placed on GitHub by Alan O'Callaghan    #
#  (could no longer find the original)      #
############################################

syntax "R" "\.R$"

# reserved words
color brightyellow "\b(if|else|repeat|while|function|for|in|next|break|TRUE|T|FALSE|F|NULL|Inf|NaN|NA|NA_integer_|NA_real_|NA_complex_|NA_character_|\.\.\.)\b"
color brightyellow "\.\.[0-9]"
color brightred "\b(require|library)\b"

# logicals
color brightgreen "(==|<=|>=|!=|!|<|>|\||\|\||&|&&|%in%|%%|%\*%|%/%|%o%|%x%)"

# strings
color cyan "'[^']*'"
color cyan ""[^"]*""
# "

# variable definitions
color blue "^.*?<-"

color yellow start="[$@%]" end="[[:alnum:]]*"

# function definitions
color magenta "\<([A-Za-z0-9\.]+)\>\("

# parameters -- not working yet
# icolor brightblue "[^,\(=]*=(?:[^=])"

# danger!
color black,red "(stop|warning|return)"
color red " = "

color yellow "[(){}[;|<>]"
color yellow "\]"
color brightred "<-"

## Comment highlighting
color brightblack "#.*$"