diff --git a/README b/README
--- a/README
+++ b/README
@@ -12,7 +12,7 @@
 [sc3]: http://audiosynth.com/
 [gnuplot]: http://www.gnuplot.info/
 
-© [rohan drape][rd], 2012, [gpl][gpl].
+© [rohan drape][rd], 2013, [gpl][gpl].
 
 [rd]: http://rd.slavepianos.org/
 [gpl]: http://gnu.org/copyleft/
diff --git a/Sound/SC3/Plot.hs b/Sound/SC3/Plot.hs
--- a/Sound/SC3/Plot.hs
+++ b/Sound/SC3/Plot.hs
@@ -4,12 +4,16 @@
 import qualified Graphics.Gnuplot.Value.Tuple as G
 import Sound.SC3.Plot.Histogram
 import Sound.SC3.UGen.Envelope {- hsc3 -}
+import System.Directory {- directory -}
+import System.FilePath {- filepath -}
+import System.Process {- process -}
 
 eps :: G.Attribute
 eps = G.EPS "/tmp/plot.eps"
 
 -- | Plot 'Envelope' data.
 --
+-- > import Sound.SC3
 -- > plotEnvelope [envPerc 0.2 1,envSine 1 0.75]
 plotEnvelope :: (G.C t,Ord t, Floating t, Enum t) => [Envelope t] -> IO ()
 plotEnvelope = G.plotLists [] . map (envelope_render 256)
@@ -32,8 +36,43 @@
 
 type Coord x = [(x,x)]
 
--- > plotCoord [[(0,0),(0.15,0.35),(0.75,0.25),(0.35,0.15)]]
+{--| Plot two-dimensional coordinates.
+
+> let {t = [-pi,-pi + 0.01 .. pi]
+>     ;f r t = (r t * cos t,r t * sin t)}
+> in plotCoord [zip (map cos t) (map sin t)
+>              ,zip (map cos t) (map (sin . (* 3)) t)
+>              ,map (f ((/ (2 * pi)) . (+ pi))) t]
+
+-}
 plotCoord :: G.C t => [Coord t] -> IO ()
 plotCoord =
     let s = G.defaultStyle {G.plotType = G.LinesPoints}
     in G.plotPathsStyle [] . zip (repeat s)
+
+type Path x = [(x,x,x)]
+
+{--| Three dimensional variant of 'plotCoord'.
+
+> let {t = [-pi,-pi + 0.01 .. pi]
+>     ;f n d = map (sin . (+) d . (*) n) t
+>     ;(x,y,z) = (f 1 (pi/2),f 3 0,f 5 0)}
+> in plotPath (zip3 x y z)
+
+> let {t' = [-pi,-pi + 0.01 .. pi]
+>     ;e' = [0,0.005 .. pi]
+>     ;f a b r e t = ((a * t + r * sin e) * cos t
+>                    ,(a * t + r * sin e) * sin t
+>                    ,b * t + r * (1 - cos e))}
+> in plotPath (zipWith (f 1 1 1) e' t')
+
+-}
+plotPath :: (Num t,Show t) => Path t -> IO ()
+plotPath p = do
+  tmp <- getTemporaryDirectory
+  let nm = tmp </> "plotPath.data"
+      cm = "splot '" ++ nm ++ "' with l"
+      f (x,y,z) = unwords (map show [x,y,z])
+  _ <- writeFile nm (unlines (map f p))
+  _ <- rawSystem "gnuplot" ["-p","-e",cm]
+  return ()
diff --git a/hsc3-plot.cabal b/hsc3-plot.cabal
--- a/hsc3-plot.cabal
+++ b/hsc3-plot.cabal
@@ -1,10 +1,10 @@
 Name:              hsc3-plot
-Version:           0.13
+Version:           0.14
 Synopsis:          Haskell SuperCollider Plotting
 Description:       Plotting functions for hsc3
 License:           GPL
 Category:          Sound
-Copyright:         (c) Rohan Drape and others, 2012
+Copyright:         (c) Rohan Drape and others, 2013
 Author:            Rohan Drape
 Maintainer:        rd@slavepianos.org
 Stability:         Experimental
@@ -17,8 +17,11 @@
 
 Library
   Build-Depends:   base == 4.*,
-                   hsc3 == 0.13.*,
+                   directory,
+                   hsc3 == 0.14.*,
+                   filepath,
                    gnuplot,
+                   process,
                    statistics,
                    vector
   GHC-Options:     -Wall -fwarn-tabs