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MathGroup Archive 2005

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Re: Batch

  • To: mathgroup at smc.vnet.net
  • Subject: [mg60388] Re: [mg60364] Batch
  • From: "David Annetts" <davidannetts at aapt.net.au>
  • Date: Thu, 15 Sep 2005 05:16:11 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Maria,

>     I need to run a batch in Mathematica, so that I read data 
> from several files and execute the calculations and generate 
> the graphics. 
> Then I read another group of data and perform the same 
> calculation and that goes on until the data finish.
> 
>     I just manage to do this by putting all the calculation 
> in a single cell, inside a Do. My cases are rather large, I 
> am dealing with experimental data and I have to manipulate 
> files with 1,000,000 points. 
> I cannot just read all of them at once and start the calculus.
> 
>     My first go was to separate the calculations in notebooks 
> and one nb called the next one. The first notebook called the 
> following without a problem, but it did not evaluate it. I 
> had to do it manually. And I have around 100 cases to 
> analyse. I really need to automatize the procedure.

My suggestion is to save each notebook as a package (File->Save as
special->Package format).  This will leave you with a series of files that
you can happily batch, either from your operating system, or through
Mathematica.

For example, we can generate some files using

	(
      	ount = OpenWrite[onam[[#]]];
      	ostr = "Print[\"Hi from file : \", ";
	      ostr = StringJoin[ostr, ToString[#], "];"];
      	Write[ount, OutputForm[ostr]];
	      Close[ount];
      ) & /@ Range[Length@onam]

Then, under Windows, we can run them sequentially using the batch file

	c:\Mathematica\5.0.1\math  < File_0001.m
	c:\Mathematica\5.0.1\math  < File_0002.m
	c:\Mathematica\5.0.1\math  < File_0003.m
	c:\Mathematica\5.0.1\math  < File_0004.m
	c:\Mathematica\5.0.1\math  < File_0005.m

You will probably have to change the path to math.exe.  Note that this is
not the front end, nor even the kernel, but a text-mode front end.

It is also worth noting that we can use Mathematica to run the batch process
using the following code

	ifil = FileNames["*.m"]
	(
      	Print["Working on file : ", ifil[[#]]];
	      Get[ifil[[#]]];
      ) & /@ Range[Length@ifil]

Regards,

Dave.


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