Reason why this doesn't work?

Michael

==========

[michael@sabal ~]$ cabal install monte-carlo

Resolving dependencies...

Downloading primitive-0.3.1...

Configuring primitive-0.3.1...

Preprocessing library primitive-0.3.1...

Building primitive-0.3.1...

[1 of 7] Compiling Data.Primitive.MachDeps ( Data/Primitive/MachDeps.hs, dist/build/Data/Primitive/MachDeps.o )

[2 of 7] Compiling Control.Monad.Primitive ( Control/Monad/Primitive.hs, dist/build/Control/Monad/Primitive.o )

Control/Monad/Primitive.hs:24:1:

Warning: Module `GHC.IOBase' is deprecated: use GHC.IO instead

[3 of 7] Compiling Data.Primitive.Types ( Data/Primitive/Types.hs, dist/build/Data/Primitive/Types.o )

Data/Primitive/Types.hs:39:30:

Warning: In the use of `mkNorepType'

(imported from Data.Data):

Deprecated: "Use mkNoRepType instead"

[4 of 7] Compiling Data.Primitive.Array ( Data/Primitive/Array.hs, dist/build/Data/Primitive/Array.o )

Data/Primitive/Array.hs:27:30:

Warning: In the use of `mkNorepType'

(imported from Data.Data):

Deprecated: "Use mkNoRepType instead"

[5 of 7] Compiling Data.Primitive.ByteArray ( Data/Primitive/ByteArray.hs, dist/build/Data/Primitive/ByteArray.o )

Data/Primitive/ByteArray.hs:36:30:

Warning: In the use of `mkNorepType'

(imported from Data.Data):

Deprecated: "Use mkNoRepType instead"

[6 of 7] Compiling Data.Primitive.Addr ( Data/Primitive/Addr.hs, dist/build/Data/Primitive/Addr.o )

[7 of 7] Compiling Data.Primitive ( Data/Primitive.hs, dist/build/Data/Primitive.o )

Registering primitive-0.3.1...

Installing library in /home/michael/.cabal/lib/primitive-0.3.1/ghc-7.0.2

Registering primitive-0.3.1...

Downloading vector-0.7.0.1...

Configuring vector-0.7.0.1...

Preprocessing library vector-0.7.0.1...

Building vector-0.7.0.1...

[ 1 of 19] Compiling Data.Vector.Storable.Internal ( Data/Vector/Storable/Internal.hs, dist/build/Data/Vector/Storable/Internal.o )

[ 2 of 19] Compiling Data.Vector.Fusion.Util ( Data/Vector/Fusion/Util.hs, dist/build/Data/Vector/Fusion/Util.o )

[ 3 of 19] Compiling Data.Vector.Fusion.Stream.Size ( Data/Vector/Fusion/Stream/Size.hs, dist/build/Data/Vector/Fusion/Stream/Size.o )

Data/Vector/Fusion/Stream/Size.hs:25:10:

Warning: No explicit method nor default method for `*'

In the instance declaration for `Num Size'

Data/Vector/Fusion/Stream/Size.hs:25:10:

Warning: No explicit method nor default method for `abs'

In the instance declaration for `Num Size'

Data/Vector/Fusion/Stream/Size.hs:25:10:

Warning: No explicit method nor default method for `signum'

In the instance declaration for `Num Size'

[ 4 of 19] Compiling Data.Vector.Internal.Check ( Data/Vector/Internal/Check.hs, dist/build/Data/Vector/Internal/Check.o )

[ 5 of 19] Compiling Data.Vector.Fusion.Stream.Monadic ( Data/Vector/Fusion/Stream/Monadic.hs, dist/build/Data/Vector/Fusion/Stream/Monadic.o )

Loading package ghc-prim ... linking ... done.

Loading package integer-gmp ... linking ... done.

Loading package base ... linking ... done.

Loading package primitive-0.3.1 ... linking ... done.

[ 6 of 19] Compiling Data.Vector.Fusion.Stream ( Data/Vector/Fusion/Stream.hs, dist/build/Data/Vector/Fusion/Stream.o )

[ 7 of 19] Compiling Data.Vector.Generic.Mutable ( Data/Vector/Generic/Mutable.hs, dist/build/Data/Vector/Generic/Mutable.o )

[ 8 of 19] Compiling Data.Vector.Generic.Base ( Data/Vector/Generic/Base.hs, dist/build/Data/Vector/Generic/Base.o )

[ 9 of 19] Compiling Data.Vector.Generic.New ( Data/Vector/Generic/New.hs, dist/build/Data/Vector/Generic/New.o )

[10 of 19] Compiling Data.Vector.Generic ( Data/Vector/Generic.hs, dist/build/Data/Vector/Generic.o )

Data/Vector/Generic.hs:185:36:

Warning: In the use of `mkNorepType'

(imported from Data.Data):

Deprecated: "Use mkNoRepType instead"

[11 of 19] Compiling Data.Vector.Primitive.Mutable ( Data/Vector/Primitive/Mutable.hs, dist/build/Data/Vector/Primitive/Mutable.o )

[12 of 19] Compiling Data.Vector.Primitive ( Data/Vector/Primitive.hs, dist/build/Data/Vector/Primitive.o )

[13 of 19] Compiling Data.Vector.Storable.Mutable ( Data/Vector/Storable/Mutable.hs, dist/build/Data/Vector/Storable/Mutable.o )

[14 of 19] Compiling Data.Vector.Storable ( Data/Vector/Storable.hs, dist/build/Data/Vector/Storable.o )

[15 of 19] Compiling Data.Vector.Unboxed.Base ( Data/Vector/Unboxed/Base.hs, dist/build/Data/Vector/Unboxed/Base.o )

[16 of 19] Compiling Data.Vector.Unboxed ( Data/Vector/Unboxed.hs, dist/build/Data/Vector/Unboxed.o )

[17 of 19] Compiling Data.Vector.Unboxed.Mutable ( Data/Vector/Unboxed/Mutable.hs, dist/build/Data/Vector/Unboxed/Mutable.o )

[18 of 19] Compiling Data.Vector.Mutable ( Data/Vector/Mutable.hs, dist/build/Data/Vector/Mutable.o )

[19 of 19] Compiling Data.Vector ( Data/Vector.hs, dist/build/Data/Vector.o )

Registering vector-0.7.0.1...

Installing library in /home/michael/.cabal/lib/vector-0.7.0.1/ghc-7.0.2

Registering vector-0.7.0.1...

Downloading gsl-random-0.4.3...

[1 of 1] Compiling Main ( /tmp/gsl-random-0.4.32479/gsl-random-0.4.3/Setup.lhs, /tmp/gsl-random-0.4.32479/gsl-random-0.4.3/dist/setup/Main.o )

Linking /tmp/gsl-random-0.4.32479/gsl-random-0.4.3/dist/setup/setup ...

Configuring gsl-random-0.4.3...

setup: The program gsl-config is required but it could not be found.

cabal: Error: some packages failed to install:

gsl-random-0.4.3 failed during the configure step. The exception was:

ExitFailure 1

monte-carlo-0.4.1 depends on gsl-random-0.4.3 which failed to install.

[michael@sabal ~]$ ghci

GHCi, version 7.0.2: http://www.haskell.org/ghc/ :? for help

Loading package ghc-prim ... linking ... done.

Loading package integer-gmp ... linking ... done.

Loading package base ... linking ... done.

Prelude> :m + Control.Monad.MC.Class

<no location info>:

Could not find module `Control.Monad.MC.Class':

it is not a module in the current program, or in any known package.

Prelude>

--- On Mon, 6/13/11, michael rice <nowgate@yahoo.com> wrote:

From: michael rice <nowgate@yahoo.com>
Subject: Re: [Haskell-cafe] Acquiring a random set of a specific size (w/o dups) from a range of Ints
To: "Felipe Almeida Lessa" <felipe.lessa@gmail.com>
Cc: haskell-cafe@haskell.org
Date: Monday, June 13, 2011, 10:31 PM

Thanks, all.

It seemed like something like this should exist in a prob/stat package, and if so, didn't want to reinvent the wheel.

Shuffle [1..20], then take 5?

Yes, so simple, I'm embarrassed I didn't think of it.

Michael

--- On Mon, 6/13/11, Felipe Almeida Lessa <felipe.lessa@gmail.com> wrote:

From: Felipe Almeida Lessa <felipe.lessa@gmail.com>
Subject: Re: [Haskell-cafe] Acquiring a random set of a specific size (w/o dups) from a range of Ints
To: "michael rice" <nowgate@yahoo.com>
Cc: haskell-cafe@haskell.org
Date: Monday, June 13, 2011, 9:38 PM

On Mon, Jun 13, 2011 at 8:56 PM, michael rice <nowgate@yahoo.com> wrote:
> Is there an (existing) way to select 5 Ints randomly (no duplicates) from a population, say 1-20 (inclusive)?

Yes, already implemented in the monte-carlo package as sampleSubset [1],

sampleSubset :: MonadMC m => [a] -> Int -> m [a]

Complete example code for your example:

evalMC (sampleSubset [1..20] 5) (mt19937 0)

Cheers!

[1] http://hackage.haskell.org/packages/archive/monte-carlo/0.4.1/doc/html/Control-Monad-MC-Class.html#v:sampleSubset

--
Felipe.

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