created a display instance for the (haskell-)gnuplot package

ihaskell-display/ihaskell-gnuplot/IHaskell/Display/Gnuplot.hs

+{- There are 3 types of plots to consider in haskell-gnuplot: Plot, Frame and Multiplot.
+   Plot types are the actual plots, whereas Frame types are plots with additional options
+   e.g. custom axes tics, graph title etc.. Multiplots are collections of 2D and/or 3D plots.
+   We have to create instances of IHaskellDisplay for all of these types.
+
+   Note: To stop gnuplot from printing the filepath ontop of the canvas, you have to set
+         the gnuplot option "key" to "noautotitle".
+         Code: Graphics.Gnuplot.Frame.cons (Graphics.Gnuplot.Frame.OptionSet.add
+                                                    (Graphics.Gnuplot.Frame.Option.key "")
+                                                    ["noautotitle"] $ ...)
+-}
+module IHaskell.Display.Gnuplot where
+
+import qualified Graphics.Gnuplot.Plot as P
+import qualified Graphics.Gnuplot.Frame as F
+import qualified Graphics.Gnuplot.MultiPlot as M
+import qualified Graphics.Gnuplot.Terminal.PNG as Pn
+import qualified Graphics.Gnuplot.Terminal.SVG as Sv
+import qualified Graphics.Gnuplot.Graph.TwoDimensional as Tw
+import qualified Graphics.Gnuplot.Graph.ThreeDimensional as Th
+import qualified Data.ByteString.Char8 as Char
+import           Graphics.Gnuplot.Advanced (plot)
+import           Graphics.Gnuplot.Value.Atom (C)
+import           Graphics.Gnuplot.Frame.OptionSet (size, deflt)
+import           IHaskell.Display
+
+-- Plot-types
+instance (C x, C y) => IHaskellDisplay (P.T (Tw.T x y)) where
+    display fig = do
+       pngDisp <- graphDataPNG2P fig
+       svgDisp <- graphDataSVG2P fig
+       return $ Display [pngDisp, svgDisp]
+
+instance (C x, C y, C z) => IHaskellDisplay (P.T (Th.T x y z)) where
+    display fig = do
+       pngDisp <- graphDataPNG3P fig
+       svgDisp <- graphDataSVG3P fig
+       return $ Display [pngDisp, svgDisp]
+
+-- Frame-types
+instance (C x, C y) => IHaskellDisplay (F.T (Tw.T x y)) where
+    display fig = do
+       pngDisp <- graphDataPNG2F fig
+       svgDisp <- graphDataSVG2F fig
+       return $ Display [pngDisp, svgDisp]
+
+instance (C x, C y, C z) => IHaskellDisplay (F.T (Th.T x y z)) where
+    display fig = do
+       pngDisp <- graphDataPNG3F fig
+       svgDisp <- graphDataSVG3F fig
+       return $ Display [pngDisp, svgDisp]
+
+-- Type: Multiplot
+instance IHaskellDisplay M.T where
+    display fig = do
+       pngDisp <- graphDataPNGM fig
+       svgDisp <- graphDataSVGM fig
+       return $ Display [pngDisp, svgDisp]
+
+-- Filename
+name = ".ihaskell-gnuplot."
+
+-- Width and height
+w = 300
+h = 300
+  
+graphDataPNG2P :: (C x, C y) => P.T (Tw.T x y) -> IO DisplayData
+graphDataPNG2P graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Pn.cons $ name ++ "png"   
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "png"
+  return $ png w h $ base64 imgData
+
+graphDataSVG2P :: (C x, C y) => P.T (Tw.T x y) -> IO DisplayData
+graphDataSVG2P graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Sv.cons $ name ++ "svg"    
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "svg"
+  return $ svg $ Char.unpack imgData
+
+graphDataPNG2F :: (C x, C y) => F.T (Tw.T x y) -> IO DisplayData
+graphDataPNG2F graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Pn.cons $ name ++ "png"   
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "png"
+  return $ png w h $ base64 imgData
+
+graphDataSVG2F :: (C x, C y) => F.T (Tw.T x y) -> IO DisplayData
+graphDataSVG2F graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Sv.cons $ name ++ "svg"    
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "svg"
+  return $ svg $ Char.unpack imgData
+
+graphDataPNG3P :: (C x, C y, C z) => P.T (Th.T x y z) -> IO DisplayData
+graphDataPNG3P graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Pn.cons $ name ++ "png" 
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "png"
+  return $ png w h $ base64 imgData
+
+graphDataSVG3P :: (C x, C y, C z) => P.T (Th.T x y z) -> IO DisplayData
+graphDataSVG3P graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Sv.cons $ name ++ "svg" 
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "svg" 
+  return $ svg $ Char.unpack imgData
+
+graphDataPNG3F :: (C x, C y, C z) => F.T (Th.T x y z) -> IO DisplayData
+graphDataPNG3F graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Pn.cons $ name ++ "png" 
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "png"
+  return $ png w h $ base64 imgData
+
+graphDataSVG3F :: (C x, C y, C z) => F.T (Th.T x y z) -> IO DisplayData
+graphDataSVG3F graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Sv.cons $ name ++ "svg" 
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "svg" 
+  return $ svg $ Char.unpack imgData
+  
+
+graphDataPNGM :: M.T -> IO DisplayData
+graphDataPNGM graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Pn.cons $ name ++ "png"   
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "png"
+  return $ png w h $ base64 imgData
+
+graphDataSVGM :: M.T -> IO DisplayData
+graphDataSVGM graph = do
+  switchToTmpDir
+
+  -- Write the image.
+  let fname =  Sv.cons $ name ++ "svg"    
+  plot fname graph
+
+  -- Read back, and convert to base64.
+  imgData <- Char.readFile $ name ++ "svg"
+  return $ svg $ Char.unpack imgData

ihaskell-display/ihaskell-gnuplot/LICENSE

+The MIT License (MIT)
+
+Copyright (c) 2013 Andrew Gibiansky
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

ihaskell-display/ihaskell-gnuplot/Setup.hs

+import Distribution.Simple
+main = defaultMain

ihaskell-display/ihaskell-gnuplot/ihaskell-gnuplot.cabal

+-- The name of the package.
+name:                ihaskell-gnuplot
+
+-- The package version.  See the Haskell package versioning policy (PVP) 
+-- for standards guiding when and how versions should be incremented.
+-- http://www.haskell.org/haskellwiki/Package_versioning_policy
+-- PVP summary:      +-+------- breaking API changes
+--                   | | +----- non-breaking API additions
+--                   | | | +--- code changes with no API change
+version:             0.1.0.0
+
+-- A short (one-line) description of the package.
+synopsis:            IHaskell display instance for Gnuplot (from gnuplot package)
+
+-- A longer description of the package.
+-- description:         
+
+-- URL for the project homepage or repository.
+homepage:            http://www.github.com/gibiansky/ihaskell
+
+-- The license under which the package is released.
+license:             MIT
+
+-- The file containing the license text.
+license-file:        LICENSE
+
+-- The package author(s).
+author:              Doro Rose <dororose@hotmail.com>
+
+-- An email address to which users can send suggestions, bug reports, and 
+-- patches.
+maintainer:          Doro Rose <dororose@hotmail.com>,
+                     Andrew Gibiansky <andrew.gibiansky@gmail.com>
+
+-- A copyright notice.
+-- copyright:           
+
+category:            Development
+
+build-type:          Simple
+
+-- Extra files to be distributed with the package, such as examples or a 
+-- README.
+-- extra-source-files:  
+
+-- Constraint on the version of Cabal needed to build this package.
+cabal-version:       >=1.16
+
+library
+  -- Modules exported by the library.
+  exposed-modules:     IHaskell.Display.Gnuplot
+  
+  -- Modules included in this library but not exported.
+  -- other-modules:       
+  
+  -- Language extensions.
+  default-extensions: DoAndIfThenElse
+              OverloadedStrings
+             
+  -- Other library packages from which modules are imported.
+  build-depends:       base >=4.6 && <4.9,
+                       bytestring,
+                       gnuplot >= 0.5.4,
+                       ihaskell >= 0.6.2
+  
+  -- Directories containing source files.
+  -- hs-source-dirs:      
+  
+  -- Base language which the package is written in.
+  default-language:    Haskell2010

ihaskell-display/ihaskell-gnuplot/stack.yaml

+# For more information, see: https://github.com/commercialhaskell/stack/blob/release/doc/yaml_configuration.md
+
+# Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
+resolver: lts-3.14
+
+# Local packages, usually specified by relative directory name
+packages:
+- '.'
+
+# Packages to be pulled from upstream that are not in the resolver (e.g., acme-missiles-0.3)
+extra-deps:
+- gnuplot-0.5.4
+- data-accessor-transformers-0.2.1.6
+# Override default flag values for local packages and extra-deps
+flags: {}
+
+# Extra package databases containing global packages
+extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: >= 1.0.0
+
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]

stack.yaml

@@ -15,6 +15,7 @@ packages:
 - ihaskell-display/ihaskell-basic/
 - ihaskell-display/ihaskell-aeson/
 - ihaskell-display/ihaskell-hatex/
+- ihaskell-display/ihaskell-gnuplot/
 extra-deps:
 - magic-1.1
 - Rlang-QQ-0.3.1.0
@@ -24,4 +25,7 @@ extra-deps:
 - xformat-0.1.2.1
 - ratio-int-0.1.2
 - friday-0.2.2.0
+- haskell-src-exts-1.17.0
+- gnuplot-0.5.4
+- data-accessor-transformers-0.2.1.6
 resolver: nightly-2016-03-25