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Today's Topics:
1. multidimensional data (Barry DeZonia)
2. Re: multidimensional data (Francesco Ariis)
3. multidimensional data (agander)
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Message: 1
Date: Mon, 22 Apr 2019 16:25:47 -0500
From: Barry DeZonia <bdezo...@gmail.com>
To: beginners@haskell.org
Subject: [Haskell-beginners] multidimensional data
Message-ID:
<cakcvfutxy_r9ftewfvfd_unoxttiprwo0q6sfat1r6m6ku9...@mail.gmail.com>
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I've played with Haskell on and off for a number of years. I have a
question that isn't directly related to Haskell only but to functional
programming. Sorry if this is off topic.
In Haskell, how would you represent a 5 dimensional data structure of
numeric values? Imagine a dataset with axes x, y, z, channel, and time. Is
there an easy way to represent this in the data that doesn't run into all
kinds of memory limits? How would you map the data to a new state such that
the new state had pixel (1000, 2000, 100, 1, 20) set to 53?
Thanks for any info.
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Message: 2
Date: Mon, 22 Apr 2019 23:47:18 +0200
From: Francesco Ariis <fa...@ariis.it>
To: beginners@haskell.org
Subject: Re: [Haskell-beginners] multidimensional data
Message-ID: <20190422214718.dhkelmlvziijt...@x60s.casa>
Content-Type: text/plain; charset=us-ascii
Hello Barry,
On Mon, Apr 22, 2019 at 04:25:47PM -0500, Barry DeZonia wrote:
> In Haskell, how would you represent a 5 dimensional data structure of
> numeric values? Imagine a dataset with axes x, y, z, channel, and time. Is
> there an easy way to represent this in the data that doesn't run into all
> kinds of memory limits? How would you map the data to a new state such that
> the new state had pixel (1000, 2000, 100, 1, 20) set to 53?
Maybe a HashMap[1] or similar structure?
[1] http://hackage.haskell.org/package/unordered-containers-0.2.10.0
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Message: 3
Date: Tue, 23 Apr 2019 06:54:53 +0200
From: agander <agan...@gmail.com>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <beginners@haskell.org>
Subject: [Haskell-beginners] multidimensional data
Message-ID:
<CAHpJ=bduwt+grd5y-1irgjkpmv8uxz+foxbee3r7ubjiejx...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
On Monday, 22 April 2019, Barry DeZonia <bdezo...@gmail.com> wrote:
> I've played with Haskell on and off for a number of years. I have a
> question that isn't directly related to Haskell only but to functional
> programming. Sorry if this is off topic.
>
> In Haskell, how would you represent a 5 dimensional data structure of
> numeric values? Imagine a dataset with axes x, y, z, channel, and time. Is
> there an easy way to represent this in the data that doesn't run into all
> kinds of memory limits? How would you map the data to a new state such that
> the new state had pixel (1000, 2000, 100, 1, 20) set to 53?
>
Maybe a lens [1]
[1] http://hackage.haskell.org/package/lens-tutorial-1.0.
3/docs/Control-Lens-Tutorial.html
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