Re: importing and using data
- To: mathgroup at smc.vnet.net
- Subject: [mg17196] Re: [mg17106] importing and using data
- From: "Mark E. Harder" <harderm at ucs.orst.edu>
- Date: Tue, 20 Apr 1999 01:21:05 -0400
- Sender: owner-wri-mathgroup at wolfram.com
Doug,
I have had success with:
ReadList[dataStream, Number, RecordLists->True, RecordSeparators->{"\n"} ];
Your problem may be that Mathematica does not know how to parse the
boundaries between records & it needs the extra 2 options set as shown.
Also, Tab-delimiters seem to be "natural" field delimiters in Mtca. When
commas, spaces, etc. are used, I read the data stream not with "Number",but
as a string of words and use "," or " " and so forth as the "WordSeparator".
Then the list variables extracted from the resulting List-of-Lists of Words
are converted to numbers with "ToExpression". Good Luck.
-mark harder.
-----Original Message-----
From: Doug VanGoethem <vango at lamar.colostate.edu>
To: mathgroup at smc.vnet.net
Subject: [mg17196] [mg17106] importing and using data
>
>I have a large, one column data set in a tab-delimited text file. It
>appears to read correctly when I use data=ReadList["filename", Number], but
>when I tried to do a ListPlot or perform a Fourier transform I get an error
>message that says it is not a list of numbers or pairs of numbers. I have
>also tried data=Transpose[Readlist[....]], but this did not make any
>difference.
>
>Has anyone encountered this before or know how to fix it?
>Thanks,
>Doug V
>