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MathGroup Archive 2007

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Re: Trying to export two column table to text file

  • To: mathgroup at smc.vnet.net
  • Subject: [mg77870] Re: Trying to export two column table to text file
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Mon, 18 Jun 2007 07:10:11 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <f532jq$38q$1@smc.vnet.net>

Diana wrote:
> All,
> 
> I am trying to convert a list of numbers, such as:
> 
> {4, 5, 10, 11, 3, 79, ...}
> 
> to a two column text file such as:
> 
> 1 4
> 2 5
> 3 10
> 4 11
> 5 3
> 6 79 ...
> 
> Let me use the following example. Assume that I have defined an
> "r[n_]" function of arbitrary integers.
> 
> tt = Flatten[Prepend[Table[Numerator[r[n]], {n, 4, 100}], {1, 1, 5}]]
> 
> tttable = Table[{j, tt[[j]]}, {j, 1, Length[tt]}]
> 
> Export["sequence.txt", tttable]
> 
> I get an output line of "sequence.txt", but then can not find the
> file.
> 
> I am using Windows Vista, and believe I am searching the whole
> computer.
> 
> Diana M.

----- copy and paste in a Mathematica notebook the code below -----
(* Just to be sure what Mathematica version is used *)
$Version
(* Checking where is the base user directory so we are sure that you 
have read/write access on it *)
$HomeDirectory
(* Now we create an absolute pathname for the file sequence.txt to 
ensure that it will be created at the desired location *)
file = ToFileName[$HomeDirectory, "sequence.txt"]
(* Now we export the data to the specified location -- note that the 
file will be created even if tttable is not defined: in this case the 
contents of sequence.txt is just the string tttable *)
Export[file, tttable]
(* If the export command has succeeded the full pathname is returned -- 
otherwise an error message is displayed. Now with Windows Eplorer go to 
the above location: you must find the file sequence.txt there. If the 
file is not there, I have no idea what is going on on your system -- I 
have tested all the command I have suggested to you since my first reply 
and they have always been working as expected -- but this is not a 
Mathematica issue. Check with the IT department. *)
----- end of the code to be copied -----

Evaluating the above code, you should get similar outputs:

Out[2]=
5.2 for Microsoft Windows (June 20, 2005)

Out[4]=
C:\Documents and Settings\Jean-Marc

Out[6]=
C:\Documents and Settings\Jean-Marc\sequence.txt

Out[8]=
C:\Documents and Settings\Jean-Marc\sequence.txt

Regards,
Jean-Marc


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