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MathGroup Archive 2001

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Re: comma delimited output file -- modify existing code?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg31882] Re: [mg31869] comma delimited output file -- modify existing code?
  • From: Rob Pratt <rpratt at email.unc.edu>
  • Date: Sun, 9 Dec 2001 06:07:05 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

> A year ago or so, some kind soul gave me the very valuable
> method of writing a tab delimited array to a text file. Due
> to incompetence on my part, I don't have his name. Anyway,
> here is his code that works nicely:
> 
> writeArray[filename_, arrayname_] :=
>   Module[{makeStringList, outfile}, outfile = OpenWrite[filename];
>     makeDepth3[lst_] := Module[{x}, x = lst; While[Depth[x] < 3, x = {x}];
>         While[Depth[x] > 3, x = Flatten[x, 1]]; x];
>     makeStringList[lst_] :=
>       Flatten[{Drop[
>             Flatten[Transpose[{Map[ToString, lst],
>                   Table["\t", {Length[lst]}]}]], -1], {"\n"}}];
>     Scan[WriteString[outfile, Sequence @@ makeStringList[#]] &,
>       makeDepth3[arrayname], {1}]; Close[outfile]]
> 
> writeArray["filename.txt", wList];
> 
> My data in wList goes nicely into a tab delimited file.
> 
> Now, I'd like to make it a comma delimited file but (again
> due to an amazing incompetence) I can't figure out how to
> modify it for commas.  The "/t" shure looks like the culprit
> but when I change it to "/c" I don't get commas but '/c' as
> delimiters. So it is the delimiter spec but what is the
> comma spec??

I haven't checked if this works, but what about "," instead of "/c"?

Alternatively, you might just use Export[filename, expression, "CSV"].

Rob Pratt
Department of Operations Research
The University of North Carolina at Chapel Hill

rpratt at email.unc.edu

http://www.unc.edu/~rpratt/



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