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MathGroup Archive 2005

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Re: How to read a data file in text format?_from a new learner

  • To: mathgroup at smc.vnet.net
  • Subject: [mg62377] Re: How to read a data file in text format?_from a new learner
  • From: Bill Rowe <readnewsciv at earthlink.net>
  • Date: Tue, 22 Nov 2005 04:42:27 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

On 11/21/05 at 3:54 AM, yanshanguke at 163.com (deepthinker) wrote:

>I want to import a data file that produced by spectrometer into
>mathemathica and fit the data. The file is in text format
>("data.txt"). The data in the file is characters: first line:some
>descriptions. second line: 200, 45.5. third line: 201,44.3. and so
>on. If you open the file "data.txt", you will see: 

>transmission ratio by UV-3150
>200, 45.5
>201,44.3
>202,44.6
>203,46.7
>....
>1,000,75.5
>1,000,76.3

>How to import these data in to mathematica 5.0 and plot the figure?

Probably the simplest way to deal with this file would be to use Import. That is:

data=Cases[Import["data.txt", "CSV"], {_?NumberQ,_?NumberQ}];
ListPlot[data];

Should do what you want.
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