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Re: Dealing with large data sets

  • To: mathgroup at smc.vnet.net
  • Subject: [mg42988] Re: Dealing with large data sets
  • From: "Allan Hayes" <hay at haystack.demon.co.uk>
  • Date: Thu, 7 Aug 2003 00:53:46 -0400 (EDT)
  • References: <bgqabr$dd6$1@smc.vnet.net>
  • Reply-to: "Allan Hayes" <hay at haystack.demon.co.uk>
  • Sender: owner-wri-mathgroup at wolfram.com

Rees,
I get no problems with data sets of this size.

How are you importing? Is testdata a list - try Short[testdata]. Check out
the formats for Import.


Allan
---------------
Allan Hayes
hay at haystack.demon.co.uk
Voice: +44 (0)116 241 8747
Fax: +44 (0)870 164 0565
"Rees" <civnrn at hotmail.com> wrote in message
news:bgqabr$dd6$1 at smc.vnet.net...
> Dear all,
>
> I have a large dataset (156381 points) and I wish to fit a
> distribution to the dataset.  However I cannot seem to get Mathematica to
> recognise the dataset.  I imported the data as "testdata" then did
> Mean[testdata].  Unfortunately this command just repeated the data and
> failed to give me the mean value.
>
> I repeated everything using another data format:
> {0.217,0.434,0.652 etc...} with the same response.
>
>
> Any help greatly appreciated.
>
> Rees
>
> DATASET:
>
> 0.217
> 0.434
> 0.652
> 0.217
> 0.869
> 0.268
> 1.303
> 0.433
> 4.118
> 0.561
> 0.18
> 0.359
> 0.539
> 0.18
> 0.718
> 0.139
> 1.077
> 0.848
> 0.696
> 3.976
> 0.549
> 0.509
> 0.125
> 2.498
> 0.625
> 0.213
> 0.427
> 0.64
> 0.213
> 0.854
> 0.229
> 1.28
> 1.273
> 0.392
> 1.28
> 0.764
> 0.196
> 3.922
> 0.98
> 0.183
> 0.367
> 0.55
> 0.183
> 0.734
> 0.157
> 1.101
> 1.003
> 0.602
> 3.007
> 0.392
> 0.602
> 0.154
> 3.084
> 0.771
> data continues down 156381st row
>


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