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Re: Question about filenames for Export[...]

  • To: mathgroup at smc.vnet.net
  • Subject: [mg99756] Re: Question about filenames for Export[...]
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Wed, 13 May 2009 05:08:28 -0400 (EDT)

On 5/12/09 at 5:44 AM, fdsa at ff.gr (Lorents) wrote:

>Hello, I'm using Mathematica 6. I'd like to know how to define a
>file name (to be later used in Export) so that the file name
>contains the value of an index variable i. To exemplify, in Fortran
>this task would be accomplished by something like:

>character(len) :: FileName ... write(FileName,'(A,I4.4)') 'MyName',i

>These lines would produce filenames which, for i=1,2,... are
>MyName0001, MyName0002, ...

>Is there any neat way of doing the same with Mathematica?

Creating a list of indexed strings can be done as follows:

In[1]:= "file" <>
    ToString[NumberForm[#, 4, NumberPadding -> {"0", "0"}]] & /@
  Range[5]

Out[1]= {file00001,file00002,file00003,file00004,file00005}

Or if I wanted to export a list of things to a set of indexed
files I would do

MapIndexed[
  Export["file" <>
     ToString[NumberForm[#2[[1]], 4, NumberPadding -> {"0",
"0"}]], #1,
     "Table"] &, data]


Here, data is assumed to be a list of the things to export and
is assumed to be less than 10000 items.




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