RlangQQ.Internal

Documentation

r :: QuasiQuoter

Calls R with the supplied string. Variables in R prefixed hs_ cause the corresponding (un-prefixed) variable to be converted. The variable(s) must be in the class ToRVal.

For example, when this file http://code.haskell.org/~aavogt/examples/test.hs is run

 
 import RlangQQ

 x = [0 .. 10  :: Double]
 y = map (sin . (*pi) . (/10)) x

 main = do
   [r|
     library(ggplot2)
     png(file='test.png')
     plot(qplot( hs_x, hs_y ))
     dev.off()
     |]

The file is produced

quoteRExpression :: Int -> String -> Q Exp

converting R's AST

parseTree' :: Parser (Tree [Char])

parseTree :: Parser (Tree [Char])

parseTreeTest :: IO ()

hsVars :: Tree String -> [String]

gets variables like abc provided the R file contained hs_abc

classes for marshalling data

haskell -> R

class ToRVal a where

Methods

toRVal

Arguments

:: String

variable name

-> a

-> ByteString

Instances

ToRVal Double

ToRVal Int

ToRVal Integer

ToRVal String

ToRVal [Double]

ToRVal [Int]

ToRVal [Integer]

ToRVal [String]

listToVec :: Show a => String -> [a] -> ByteString

R -> haskell

class FromRVal a where

not used yet

Methods

fromRVal :: ByteString -> a

Instances

FromRVal Double

fromRValp :: Parser a -> ByteString -> a