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Re: File reading and writing within for loop

  • To: mathgroup at smc.vnet.net
  • Subject: [mg83676] Re: File reading and writing within for loop
  • From: Szabolcs Horvát <szhorvat at gmail.com>
  • Date: Wed, 28 Nov 2007 05:29:31 -0500 (EST)
  • References: <figv8v$g0e$1@smc.vnet.net>

nilaakash at gmail.com wrote:
> Hi,
>     Suppose I have 50 files like following names, in_00.dat,
> in_01.dat, in_02.dat, ........
> I want to read all the files, manipulate and save output like
> out_00.dat, out_01.dat, out_02.dat..... within a "for" loop. Could you
> please suggest how to do these ? If you have answer without "for" loop
> is also OK.
> 
> Thanks in advance.
> With regards.
> nilaakash
> 

The looping construct in Mathematica corresponding to the "for" of other 
languages is called Do[].  You could use

Do[
  Module[{suffix, data},
   suffix = StringJoin @@ ToString /@ IntegerDigits[i, 10, 2];
   data = Import["in_" <> suffix <> ".dat", "WhateverFormatYouNeed"];
   Export["out_" <> suffix <> ".dat", process[data],
          "WhateverFormatYouNeed"] ],
  {i, 0, 49}]

-- 
Szabolcs


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