Ernesto Rodriguez wrote:
Dear Haskell Community,
During the last months I used Haskell for machine learning, particularly in
the field of Echo State Neural Networks. The main drawback I encountered is
that its difficult to visualize and plot data in Haskell in spite the fact
there are a couple
Are there updates on when Simon Marlow's O'Reilly book on Parallel and
Concurrent Haskell is going to be released?
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Hey,
I am trying to fix (or at least get my head around) this:
https://github.com/valderman/haste-compiler/issues/27
Which is an issue of the haste haskell-javascript compiler. Doing so I
encounter this problem which makes me think I am not understanding
something fundamental here (and I
Hi Hienrich,
It is indeed a big scope as you mentioned. Matlab has been working for
years to get this functionality right. On the other hand, the project you
linked is interesting. For me it would already be a huge advantage if I
could edit and re-evaluate expressions interactively (in a
What I do not understand: The case switch covers all possibilities of
AltCon. So how can this happen?
There is a guard on the DataAlt case so all alternatives doesn't have to be
covered.
-- Niklas
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Hi Nathan,
DataAlt c | Right tag - genDataConTag c - return $ Cond tag
Are you sure, that genDataConTag always returns a 'Right'?
If it returns a 'Left', than the pattern won't match.
Greetings,
Daniel
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Dear List,
I’m implementing a probabilistic model for recognising musical chords in
Haskell. This model relies on a multivariate normal distribution. I’ve
been searching the internet and mainly hackage for a Haskell library to
do this for me, but so far I’ve been unsuccessful.
What I’m
Thanks
The cancelative monoid is the right class for rolling back transactions, by
the way.
2013/3/22 Mario Blažević blama...@acanac.net
The new package monoid-subclasses [1] exports a number of classes that
sit between monoids and groups: ReductiveMonoid, CancellativeMonoid,
GCDMonoid,
Hello haskellers,
is there a reason why Integer doesn't have 'NaN' as value?
I think it would be very convenient to be able to handle (1 `div` 0) as regular
NaN value and not as exception.
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Hello haskellers,is there a reason why Integer doesn't have 'NaN' as
value?I think it would be very convenient to be able to handle (1 `div` 0)
as regular NaN value and not as exception.Thanks.
I think because, if you need NaN like values, `Maybe Int` does the same job
without tainting the
You can always use the Maybe type as a follows:
intDiv :: Integer - Integer - Maybe Integer
intDiv _ 0 = Nothing
intDiv n m = Just (div n m)
This allows you to pattern match results of divisions:
example :: Integer - Integer - Maybe Integer
example n m =
case intDiv 4 n of
Nothing - Nothing
Franco answers a question :
Hello haskellers,is there a reason why Integer doesn't have 'NaN' as
value?I think it would be very convenient to be able to handle (1 `div` 0)
as regular NaN value and not as exception.Thanks.
I think because, if you need NaN like values, `Maybe Int` does the same
Oh, so obvious. That was it, thanks.
On 04/13/2013 12:08 PM, Daniel Trstenjak wrote:
Hi Nathan,
DataAlt c | Right tag - genDataConTag c - return $ Cond tag
Are you sure, that genDataConTag always returns a 'Right'?
If it returns a 'Left', than the pattern won't match.
Greetings,
Daniel
Heinrich, you hit the nail on the head.
for an interactive plotting story to work well, we wind up needing to have
better tools in the ecosystem on the gui / computational notebook side.
on the other hand, similar work was done last summer, as heinrich mentions,
in the form of ghc live
I asked this question in Haskell-beginners, but I haven't heard anything
yet, so I'm forwarding to Cafe.
Original Message
Subject: [Haskell-beginners] Monad instances and type synonyms
Date: Sat, 13 Apr 2013 17:03:57 -0800
From: Christopher Howard
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