Re: [Haskell-cafe] Creating Repa arrays from unboxed vectors

4 Oct 2012


      On 4 October 2012 20:50, Janek S.  wrote:
...
Dear list,
I'm trying to create unboxed REPA array from unboxed Vector, but I keep getting this type error:
ghci> :m + Data.Array.Repa
ghci> :m + Data.Array.Repa.Repr.Unboxed
ghci> :m + Data.Vector.Unboxed
ghci> fromUnboxed Z (Data.Vector.Unboxed.singleton 1)
<interactive>:5:16:
    Couldn't match expected type `vector-0.9.1:Data.Vector.Unboxed.Base.Vector
                                    e0'
                with actual type `Data.Vector.Unboxed.Vector a0'
    In the return type of a call of `Data.Vector.Unboxed.singleton'
    In the second argument of `fromUnboxed', namely
      `(Data.Vector.Unboxed.singleton 1)'
    In the expression: fromUnboxed Z (Data.Vector.Unboxed.singleton 1)
This makes it look like you've got two versions of vector installed,
with Repa built against the version that _isn't_ 0.9.1.
...
I am confused, because REPA documentation lists Vector from Data.Vector.Unboxed package as its
second parameter. Why am I getting this error? I have Repa 3.2 an vector 0.9.1.
Janek
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Ivan Lazar Miljenovic
Ivan.Miljenovic@gmail.com
http://IvanMiljenovic.wordpress.com