On Tue, 12 May 2015 05:50:26 +0200,
(FFTWReal r, Ix i, Shapable i) => CArray i (Complex r) -> CArray i (Complex r) : FFTWReal maps to RealFloat which i found, but i haven't found anything that will take a RealFloat and give me a Double.
L.S., You could use something like: toDouble :: FFTWReal r => r -> Double toDouble = id Or add the type of the functions you create to your program. Regards, Henk-Jan van Tuyl -- Folding@home What if you could share your unused computer power to help find a cure? In just 5 minutes you can join the world's biggest networked computer and get us closer sooner. Watch the video. http://folding.stanford.edu/ http://Van.Tuyl.eu/ http://members.chello.nl/hjgtuyl/tourdemonad.html Haskell programming --