If the internal vectors are fixed size, you can easily write a wrapper
around Vector Int that converts (Int,Int) indices into indices in the
sub-vector.
If the internal vectors have dynamic size, you can't declare an Unbox
instance, because pointers can't be unboxed; unboxed types are opaque to
Does Repa always use unboxed Vectors?
But a Repa array can store any element, so how does it handles types which
haven't an unboxed equivalent? Or is the unboxing done automatically?
2011/11/10 Bas van Dijk v.dijk@gmail.com
On 9 November 2011 22:33, kaffeepause73 kaffeepaus...@yahoo.de
Yes, it does. You can only use members of the Elt class in repa arrays, and
Elt has Unbox as a superclass.
On Thu, Nov 10, 2011 at 5:03 PM, Yves Parès limestr...@gmail.com wrote:
Does Repa always use unboxed Vectors?
But a Repa array can store any element, so how does it handles types which
Hello,
quick question about unboxed Vectors :
Is it possible to create an unboxed vector of unboxed vector ? :
import qualified Data.Vector.Unboxed as V
type UnboxedNestedVextor = V.Vector (V.Vector Int)
Alternatively I would have to use:
import qualified Data.Vector.Unboxed as V
On 9 November 2011 20:56, kaffeepause73 kaffeepaus...@yahoo.de wrote:
Hello,
quick question about unboxed Vectors :
Is it possible to create an unboxed vector of unboxed vector ? :
import qualified Data.Vector.Unboxed as V
type UnboxedNestedVextor = V.Vector (V.Vector Int)
Only if you
Hi,
I don't know about Unboxed, but you can define a newtype wrapper
around Data.Vector.Storable that includes the size as a type-level
natural.
i.e.
data Z
data S n
newtype Vec n a = Vec (Vector a)
Then you can define a storable instance for Storable a = Vec n a, and
thus you can define a
On 9 November 2011 10:56, kaffeepause73 kaffeepaus...@yahoo.de wrote:
Is it possible to create an unboxed vector of unboxed vector ? :
Why do you want to do this?
If you want multi-dimensional unboxed arrays you could try out repa:
Thanks for the replies. - Looks like there's not a straight forward way and
I'm not yet on a level
and don't have the time to make fancy wrappers or instances.
Repa is indeed very Interesting, but I have changing vector length in the
second dimension and later on only want to generate Data on
On 9 November 2011 22:33, kaffeepause73 kaffeepaus...@yahoo.de wrote:
Repa is indeed very Interesting, but I have changing vector length in the
second dimension and later on only want to generate Data on demand. If I use
Matrices, I will use loads of space for no reason.
Even if it is possible
