Re: [Haskell-cafe] Data Type Inheritance ala OO - Inheritence -- howto best in Haskell ?
Hi David, thanks for the links. I had a lok at the OO-paper some time ago already, heard however that its quite unusual and rather tricky to do OO-style programming in Haskell. So I'm looking for suggestions how to tackle this problem in a functional way. Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/Data-Type-Inheritance-ala-OO-Inheritence-howto-best-in-Haskell-tp4494800p4496726.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANN: hmatrix-0.11
Hi Alberto. first of all thanks for an awesome library, it really makes life a lot easier. Then thanks as well for Your openness on the re-licensing issue. I played with the thought of starting some numeric software with haskell - haskell is a really exiting language in that respect, the efficient matrix calcs however are of the essence. Very likely it won't happen now - for other reasons, but I realised that for promoting Haskell further this could be a key issue. Now it definitely doesn't sound trivial to get away from the external libraries for efficient matrix storage via optimised c-code, but whatever u can move without big effort is a start. But no pressure from my side, Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/ANN-hmatrix-0-11-tp3357796p3358841.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] GPL License of H-Matrix and prelude numeric
Hi Ivan, thanks for making me aware that this is a potentialy controverse topic. -- I have highest respect of people writing open source and I totally respect their decision. -- View this message in context: http://haskell.1045720.n5.nabble.com/GPL-License-of-H-Matrix-and-prelude-numeric-tp3357022p3357131.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] HMatrix Vector/Matrix interpolation ala Matlab interp/interp2 ??
Hi Henning, thanks for the code review -- reason that I don't use the type declaration a lot -- It causes trouble , because I don't yet fully understand it. When I declare what I think is right is fails - see Message at bottom -- so what's wrong ? By the way I just used lists so far - no arrays -- Why is !! inefficient ? - what is better - Cheers Phil 1 import Data.List 2 3 -- Input Data 4 xi :: [Double] 5 xi = [0 .. 10] 6 yi :: [Double] 7 yi = [2, 3, 5, 6, 7, 8, 9, 10 , 9, 8, 7] 8 x = 11 :: Double 9 10 -- Functions 11 limIndex :: [a] -> Int -> Int 12 limIndex xi idx 13| idx < 0 = 0 14 | idx > (length xi)-2 = (length xi)-2 15| otherwise = idx 16 17 getIndex :: [a] -> Double -> Int 18 getIndex xi x = limIndex xi (maybe (length xi) id (findIndex (>x) xi)-1) 19 20 getPnts :: [a] -> [a] -> Int -> [a] 21 getPnts xi yi idx = [xi !! idx, xi !! (idx+1), yi !! idx, yi !! (idx+1)] 22 23 interp :: [a] -> [a] -> Double -> Double 24 interp xi yi x = 25 let pts = getPnts xi yi (getIndex xi x) 26 in (pts!!3-pts!!2)/(pts!!1-pts!!0)*(x-pts!!0)+pts!!2 27 28 -- Calc 29 y = interp xi yi x 30 31 main = do 32 -- Output Data 33 print (y) === Compiler Error Message === interp_v4.hs:18:66: Couldn't match expected type `Double' against inferred type `a' `a' is a rigid type variable bound by the type signature for `getIndex' at interp_v4.hs:17:13 Expected type: [Double] Inferred type: [a] In the second argument of `findIndex', namely `xi' In the third argument of `maybe', namely `(findIndex (> x) xi)' interp_v4.hs:26:39: Couldn't match expected type `Double' against inferred type `a' `a' is a rigid type variable bound by the type signature for `interp' at interp_v4.hs:23:11 In the second argument of `(-)', namely `pts !! 0' In the second argument of `(*)', namely `(x - pts !! 0)' In the first argument of `(+)', namely `(pts !! 3 - pts !! 2) / (pts !! 1 - pts !! 0) * (x - pts !! 0)' -- View this message in context: http://haskell.1045720.n5.nabble.com/HMatrix-Vector-Matrix-interpolation-ala-Matlab-interp-interp2-tp3352833p3357089.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] GPL License of H-Matrix and prelude numeric
Hi all, I realised that haskell in the base libraries tries to consistently stick to the permissive BSD license to also give the language traction in the commercial world. The H-Matrix and the prelude numeric packages however, which in my mind cover really important ground work, are issued under the resprictive GPL. Is that only because they link into other external GNU - libaries with GPL license ? -- If yes would be repackaging the haskell-native bits in an extra BSD package an option ? Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/GPL-License-of-H-Matrix-and-prelude-numeric-tp3357022p3357022.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] HMatrix Vector/Matrix interpolation ala Matlab interp/interp2 ??
Hi, I created some code from scratch - probably "ugly" beginners style - so I'm keen to get tips how to make it more pretty and faster Cheers Phil import Data.List -- Input Data xi :: [Double] xi = [0 .. 10] yi :: [Double] yi = [2, 3, 5, 6, 7, 8, 9, 10 , 9, 8, 7] x = 11 :: Double -- Functions limIndex xi idx | idx < 0 = 0 | idx > (length xi)-2 = (length xi)-2 | otherwise = idx getIndex xi x = limIndex xi (maybe (length xi) id (findIndex (>x) xi)-1) getPnts xi yi idx = [xi !! idx, xi !! (idx+1), yi !! idx, yi !! (idx+1)] interp xi yi x = let pts = getPnts xi yi (getIndex xi x) in (pts!!3-pts!!2)/(pts!!1-pts!!0)*(x-pts!!0)+pts!!2 -- Calc y = interp xi yi x main = do -- Output Data print (y) -- View this message in context: http://haskell.1045720.n5.nabble.com/HMatrix-Vector-Matrix-interpolation-ala-Matlab-interp-interp2-tp3352833p3356966.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] HMatrix Vector/Matrix interpolation ala Matlab interp/interp2 ??
Hi Claude, thanks a lot. - Your code looks interesting. I just don't fully get how it works: - are t a b c d points or curve parameters ? - how does lifting to matrix create a 1d spline to a 2d spline ? -- I don't see how it works Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/HMatrix-Vector-Matrix-interpolation-ala-Matlab-interp-interp2-tp3352833p3353230.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] HMatrix Vector/Matrix interpolation ala Matlab interp/interp2 ??
Hi Claude, thanks a lot. - Your code looks interesting. I just don't fully get how it works: - are t a b c d points or curve parameters ? - how does lifting to matrix create a 1d spline to a 2d spline ? -- I don't see how it works Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/HMatrix-Vector-Matrix-interpolation-ala-Matlab-interp-interp2-tp3352833p3353231.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] HMatrix Vector/Matrix interpolation ala Matlab interp/interp2 ??
Hi Henning, thanks - I don't claim I understand that yet with my limited haskell knowledge, but it looks rather advanced passing modules around. If there isn't anything "standard" of the shelf (which is important feedback), than its probably the best for me to pull it up from scratch and go through the learning curve. Many thanks, Philipp -- View this message in context: http://haskell.1045720.n5.nabble.com/HMatrix-Vector-Matrix-interpolation-ala-Matlab-interp-interp2-tp3352833p3353225.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] HMatrix Vector/Matrix interpolation ala Matlab interp/interp2 ??
Dear Haskellers, I'm looking for Vector and especially Matric interpolation ala: z = interp2 (xMatrix, yMatrix, zMatrix, x, y) - x and y can be single values or also vectors or matrices - indeally with the options nearest, linear, quadratic, qubic.. Any hope that there is something similar especially using the HMatrix matrices (Matrix Double). - If I have to code it any suggestions ? Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/HMatrix-Vector-Matrix-interpolation-ala-Matlab-interp-interp2-tp3352833p3352833.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] H98, OOHaskell - getting started with objects in Haskell
Thanks to all of You, I think I learnt really a lot just on this thread about Haskell and also OO in general. I fear I'm too busy in the near future to come up with a good example and some more questions. Might happen later, because this topic is really interesting. Till then -- Thanks Philipp -- View this message in context: http://haskell.1045720.n5.nabble.com/H98-OOHaskell-getting-started-with-objects-in-Haskell-tp3338991p3346982.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] H98, OOHaskell - getting started with objects in Haskell
Hi Nick, thanks a lot -- timber-lang seems very interesting, but seems still too young for productive useage. That language probably needs 2 more years to stabilise, but its defintely good that its so haskell related. The other links are very interesting (especially the coding examples), but I'll need some time to digest. -- Might come back with some questions. Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/H98-OOHaskell-getting-started-with-objects-in-Haskell-tp3338991p3343777.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] H98, OOHaskell - getting started with objects in Haskell
On Fri, 14 Jan 2011 12:36:22 -0800 (PST) "Wolfgang Jeltsch-2 [via Haskell]" wrote: > Is this really ideal for OO? I thought that in a cellular automaton, > all cells have to change synchronously. In addition, cells have to > access the old states of their neighbours to compute their new > states. So you would have to heavily synchronize the objects. > > In this light, I’d say that the distributed OO approach isn’t very > practical. A global control of the whole system might be better. > > Note that I’m by no way an expert in cellular automata. I’m just > thinking of the game of life. :-) > > Best wishes, > Wolfgang Hi Wolfgang, I don't yet have experience with cellular automata either. What u say seems plausible, but then the life game might have been coded that way, because most OO language don't offer concurrent objects and the distributed OO approach (seems to be a very recent concept). Looking at life u probably could save time, if u only would evaluate code on cells, where the neighbors have changed status. So rather than triggering them all centrally and each checks its neighbours, we could use the concept: - let the active ones trigger the neighbours & so pass on activity > > ___ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > > > __ > View message @ > http://haskell.1045720.n5.nabble.com/H98-OOHaskell-getting-started-with-objects-in-Haskell-tp3338991p3341886.html > > To unsubscribe from H98, OOHaskell - getting started with objects in > Haskell, visit > http://haskell.1045720.n5.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=3338991&code=cGhpbGlwcC5ndXR0ZW5iZXJnQGdteC5uZXR8MzMzODk5MXwxNDUxNzE5MDIw -- View this message in context: http://haskell.1045720.n5.nabble.com/H98-OOHaskell-getting-started-with-objects-in-Haskell-tp3338991p3343767.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] H98, OOHaskell - getting started with objects in Haskell
Hi, thanks for all Your answers (and again I'm amazed how active and good this forum is). I expected OOHaskell to be on the somewhat "extended" side, but I didn't expect it to be so uncommon. This very strong and clear feedback is indeed very valuable. I think I see the complexities of OO-programming in larger programs (unforeseen interactions), but I'm still doubtfull, that functional programming can equally adress all tasks equally efficient. I'm especially interestes in engineering calculation tasks where cellular automata could be used. In that case all u have to do is to give the class the right properties and that "let it grow". Such a localised intelligence approach seems an ideal OO - task. I don't know whether something functional could achieve the same. Sounds like a nice challenge. -- I'll chew on a small example. Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/H98-OOHaskell-getting-started-with-objects-in-Haskell-tp3338991p3340604.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] H98, OOHaskell - getting started with objects in Haskell
Hi, I wanted to check whether Haskell offers reasonably easy object oriented programming -- I already had a look into "Haskell's overlooked object system" und "A Gentle Introduction to Haskell 98" [H98] There are a few things where I could use advice with: 1. OOHaskell doesn't seem to be available in the HackageDB (cabal) -- so how do I install it especially on Debian ? 2. is OOHaskell the right way to go - is it standardised (H98) or is it extension and is it widely used and recommended ? 3. Haskell 98 offers datatypes and some sort of monadic classes -- is it possible to build simple objects without OOHaskell ? 4. When I want object properties to change, when should I use IORef when STRef ? Thanks in advance, Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/H98-OOHaskell-getting-started-with-objects-in-Haskell-tp3338991p3338991.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matlab Style Logic Operations ala V1.*(V2>0) on Vectors and Matrices with HMatrix ??
Jep, finally got it - that code works now. The Problem I had at the end was that I didn't distinguish between type declaration of a function and a value. -- the commented line for matrix 3 below shows what I did wrong. I think we can close that topic for now - Thanks a lot for Your help Henning, Cheers Phil Code ## import Numeric.LinearAlgebra import Graphics.Plot matrix1:: Matrix Double matrix1 = fromLists [[1,2],[3,4],[5,6]] matrix2:: Matrix Double matrix2 = fromLists [[-1,2],[-3,4],[5,-6]] funct:: Double -> Double -> Double funct = \a1 a2 -> if a2>=0 then a1 else 0 matrixfunction:: (Double -> Double -> Double) -> Matrix Double -> Matrix Double -> Matrix Double matrixfunction f x y = liftMatrix2 (zipVectorWith f ) x y matrix3:: Matrix Double -- matrix3 :: (Double -> Double -> Double) -> Matrix Double -> Matrix Double -> Matrix Double matrix3 = matrixfunction funct matrix1 matrix2 disp = putStr . disps 2 main = do disp matrix1 disp matrix3 -- View this message in context: http://haskell.1045720.n5.nabble.com/Matlab-Style-Logic-Operations-ala-V1-V2-0-on-Vectors-and-Matrices-with-HMatrix-tp3312601p3318891.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matlab Style Logic Operations ala V1.*(V2>0) on Vectors and Matrices with HMatrix ??
Hi, Thanks for the help on the typing issue, that helped my understanding a lot. Regarding the lift2 Matrix: this line works : matrixfunction x y = liftMatrix2 (zipVectorWith(\a1 a2 -> if a2>=0 then a1 else 0)) x y but when I use this line : matrixfunction f x y = liftMatrix2 (zipVectorWith f) x y how can / do I have to define f in a seperate line a way, that it works and gives the same result ? Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/Matlab-Style-Logic-Operations-ala-V1-V2-0-on-Vectors-and-Matrices-with-HMatrix-tp3312601p3318471.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matlab Style Logic Operations ala V1.*(V2>0) on Vectors and Matrices with HMatrix ??
Hi Henning, You definitly caught me on that little Germanism :-) About Your comments - a lot to learn and take in, but it really helps. - Thanks a lot. I just manged to get the Matrix masking running code looks like (code A see below). Two quick questions: question 1. u see the two commented lines I tried to get ur original line running, but didn't know how to specify f ## Code import Numeric.LinearAlgebra import Graphics.Plot matrix1 = fromLists [[0 .. 5],[30 .. 35],[50 .. 55]] matrix2 = fromLists [[-1,2],[-3,4],[5,-6]] -- matrix1 = buildMatrix 3 4 ( (r,c) -> fromIntegral r * fromIntegral c) (3><4) -- posPart v = mapVector (\a -> if a>=0 then a else 0) v -- function2map a1 a2 = (\a1 a2 -> if a1>=0 then a2/a1 else a1/a2) matrixfunction x y = liftMatrix2 (zipVectorWith(\a1 a2 -> if a2>=0 then a1 else 0)) x y matrix3 = matrixfunction matrix1 matrix2 disp = putStr . disps 2 main = do disp matrix1 disp matrix2 -- disp matrix3 mesh matrix1 # question 2: - the compiler comes up with some weired data type problem -- ghci has no problem this line : matrixTest_Fail.hs:5:10: Ambiguous type variable `t' in the constraints: `Element t' arising from a use of `fromLists' at matrixTest_Fail.hs:5:10-38 `Num t' arising from the literal `1' at matrixTest_Fail.hs:5:22 Possible cause: the monomorphism restriction applied to the following: matrix2 :: Matrix t (bound at matrixTest_Fail.hs:5:0) Probable fix: give these definition(s) an explicit type signature or use -XNoMonomorphismRestriction ## Code # import Numeric.LinearAlgebra import Graphics.Plot matrix1 = fromLists [[1,2],[3,4],[5,6]] matrix2 = fromLists [[1,2],[3,4],[5,6]] disp = putStr . disps 2 main = do disp matrix1 # -- View this message in context: http://haskell.1045720.n5.nabble.com/Matlab-Style-Logic-Operations-ala-V1-V2-0-on-Vectors-and-Matrices-with-HMatrix-tp3312601p3315761.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matlab Style Logic Operations ala V1.*(V2>0) on Vectors and Matrices with HMatrix ??
Hi Henning, Yes I just realised my mistake myself - I hand over the function instead of the result. A really facinating concept by the way. Thanks again for the Matrix notation - will give it a go right away now. And the "manoever critics" on the code is really nice. - Helps me a lot to embrace the haskell syntax. One thing that still confuses me a litte: polynom: double -> double ->double polynom x y = y^2 + x^2 + 2*x*y Type declaration for this polynom with two inputs - what is input and what is output and which way a I supposed to read it ? -- x,y,polynom ? and when would I use double -> double => double Is there by the way the possibility in haskell to create functions with several outputs - ala Matlab function declation: function [N,k] = histogram(v,n) Hope I'm not asking too basic questions here, so feel free to point me to the right tutorial. Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/Matlab-Style-Logic-Operations-ala-V1-V2-0-on-Vectors-and-Matrices-with-HMatrix-tp3312601p3314252.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Matlab Style Logic Operations ala V1.*(V2>0) on Vectors and Matrices with HMatrix ??
Hi Henning, Hi Alberto, thanks for the quick and comprehensive help. - I managed to implement Hennings suggestion with mapVector and zipWithVector. -- However have a type inference problem with zipVectorWith -- probably a stupid beginners mistake. (have a look below). I want to look into the matrix thing as well, but that might take a bit. Its very good to hear that HMatrix develpment is going on and there are plans to implement more of Matlabs syntax. I see the point, that its probably not the "cleanest" way (bool to 0 & 1) but its damn convinient (laziness at its best). Maybe there could be a haskell way to implement the "lazy" matlab matrix and vector operation syntax (like explicit function for bool 2 num) Cheers Phil Code import Numeric.LinearAlgebra import Graphics.Plot time = 101 |> [0, 0.1 .. 100 :: Double]; vector1 = sin(time); vector2 = vector1*0.9; posPart:: Vector Double -> Vector Double posPart v = mapVector (\a -> if a>=0 then a else 0) v v3:: Vector Double -> Vector Double -> Vector Double v3 v1 v2 = zipVectorWith(\a1 a2 -> if a1>=0 then a2/a1 else a1/a2) v1 v2 main = do -- print(v3) mplot [v3] mplot [posPart vector1] ### Compile error Couldn't match expected type `Vector Double' against inferred type `Vector Double -> Vector Double -> Vector Double' In the expression: v3 In the first argument of `mplot', namely `[v3]' In a stmt of a 'do' expression: mplot [v3] -- View this message in context: http://haskell.1045720.n5.nabble.com/Matlab-Style-Logic-Operations-ala-V1-V2-0-on-Vectors-and-Matrices-with-HMatrix-tp3312601p3314171.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Matlab Style Logic Operations ala V1.*(V2>0) on Vectors and Matrices with HMatrix ??
Hi all, In Matlab the following line of code: V3 = V1.*(V2>0) (V2>0) gives a Bool-Vector with ones (trues) and zero's where elements of V2 are > 0; Then this Bool vector is used to multiply all elements in V1 to zero where the condition V2>0 is not fulfilled. How can I do that in Haskell ? (I haven't seen bol operations or mapping functions into vectors, arrays in the HMatrix.pdf). . -- Many thanks in advance Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/Matlab-Style-Logic-Operations-ala-V1-V2-0-on-Vectors-and-Matrices-with-HMatrix-tp3312601p3312601.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Haskell on Debian - gcc compilation problem with cabal installed libs like hmatrix, etc.
Hi Henk-Jan, thanks for the advice - using hmatrix already worked, but only with simple matrices. I'll check the dependencies thanks. Hi Jason, thanks a lot for the response. Looks like I found a like minded soul. These links indeed sound very relevent for me. Thanks and see u around, Philipp -- View this message in context: http://haskell.1045720.n5.nabble.com/Haskell-on-Debian-gcc-compilation-problem-with-cabal-installed-libs-like-hmatrix-etc-tp3311396p3312494.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Haskell on Debian - gcc compilation problem with cabal installed libs like hmatrix, etc.
Hi Jason, many,many thanks - it works. -- u saved the day Haskell rather seems like a steeper slope to be honest, but I find the whole language concept very fascinating. What I can't imagine yet, how to address typical oo-problems especially when its "not allowed" to update and change variables ... Cheers Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/Haskell-on-Debian-gcc-compilation-problem-with-cabal-installed-libs-like-hmatrix-etc-tp3311396p3311494.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Haskell on Debian - gcc compilation problem with cabal installed libs like hmatrix, etc.
Hi, I'm very new to Haskell and this Forum, just doing my first steps ... -- Try to use the hmatrix package for vector and matrix calculations. The haskell compilation works (no problem in GHCi mode), the gcc however compilation fails with messages like: EFA.o: In function `r1bo_info': (.text+0x48): undefined reference to `hmatrixzm0zi10zi0zi0_NumericziVector_zdfNumVector1_closure' EFA.o: In function `r1bs_info': (.text+0x10a): undefined reference to `hmatrixzm0zi10zi0zi0_NumericziVector_zdfFractionalVector_closure' Obviously gcc doesn't know where the according libraries are installed. Same problem with other packages. I installed the haskell base system over debian (debian squeeze), gcc version 4.4.5. - Hmatrix and other packages are installed and build over cabel into local folder ~/.cabal/lib Do I need to set a system path, or change cabal options or .. ? Thanks in advance, Phil -- View this message in context: http://haskell.1045720.n5.nabble.com/Haskell-on-Debian-gcc-compilation-problem-with-cabal-installed-libs-like-hmatrix-etc-tp3311396p3311396.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
