Re: [Haskell-cafe] Drawing charts over a lot of data

2011-11-28 Thread Tim Docker 

On 22/11/2011, at 10:55 AM, Bryan O'Sullivan wrote:

Be aware that Chart is pretty slow on large data sets.


I've noticed this too. I believe the issue is with the cairo bindings  
- hopefully a new version

of gtk2hs will fix this:

http://www.mail-archive.com/haskell-cafe@haskell.org/msg94451.html

Tim



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[Haskell-cafe] Drawing charts over a lot of data

2011-11-21 Thread Eugene Kirpichov 
Hi cafe,

Are there any (possibly unfinished?) libraries dedicated to drawing charts
over large amounts of data? I mean, such amounts that you don't want to
store the whole set of input data in memory and instead you prefer to do
one or a few passes over the input, calling the library's drawing functions
for each data point.

I'm currently using the excellent Chart package
http://hackage.haskell.org/package/Chart , but it seems to require quite a
bit of work to become usable in this mode (I haven't looked really deep
yet).

So, I'd be happy if someone pointed me to an existing package (I didn't
find one on hackage) or if someone expressed interest in making Chart avoid
having the whole input in memory.

-- 
Eugene Kirpichov
Principal Engineer, Mirantis Inc. http://www.mirantis.com/
Editor, http://fprog.ru/
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Re: [Haskell-cafe] Drawing charts over a lot of data

2011-11-21 Thread Felipe Almeida Lessa 
This doesn't directly solve your problem, but you may want to take a
look at zoom-cache [1].  I've never used it myself, but it seems
pretty nice.

Cheers,

[1] http://hackage.haskell.org/package/zoom-cache

-- 
Felipe.

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Re: [Haskell-cafe] Drawing charts over a lot of data

2011-11-21 Thread Conrad Parker 
On 21 November 2011 22:36, Felipe Almeida Lessa felipe.le...@gmail.com wrote:
 This doesn't directly solve your problem, but you may want to take a
 look at zoom-cache [1].  I've never used it myself, but it seems
 pretty nice.

 Cheers,

 [1] http://hackage.haskell.org/package/zoom-cache

Hi,

zoom-cache is useful for managing time-series data. There is a
zoom-cache-gnuplot in development, and it would probably be useful to
make a tool that uses Chart. I'm happy to help with that :)

Conrad.

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Re: [Haskell-cafe] Drawing charts over a lot of data

2011-11-21 Thread Bryan O'Sullivan 
On Mon, Nov 21, 2011 at 3:47 PM, Conrad Parker con...@metadecks.org wrote:


 zoom-cache is useful for managing time-series data. There is a
 zoom-cache-gnuplot in development, and it would probably be useful to
 make a tool that uses Chart. I'm happy to help with that :)


Be aware that Chart is pretty slow on large data sets.
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