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Re: Batch

  • To: mathgroup at
  • Subject: [mg60414] Re: Batch
  • From: dh <dh at>
  • Date: Fri, 16 Sep 2005 03:48:54 -0400 (EDT)
  • References: <> <dg8l4h$r21$>
  • Sender: owner-wri-mathgroup at

Hi Maria,
Lets first state your question how I understand it:
You have some data processing procedure that reads data from some files 
and generates some output. This you want to repeat several times.

Here is a solution.
Encapsulate the data processing in a function, e.g. fun[] that takes a 
list of file names as input, reads the files and processes this input:

Second, Eeach processing (i) uses a bunch of files : {filei1,filei2,..}. 
We assemble these lists into a "super" list:
files={ {file11,file12,..}, {file21,file22,..}, .. }

We now map the data processing function to the files:
fun /@ files

this will sequentially process each sublist of files

hope this helps, Daniel

Maria Cristina Dias Tavares wrote:
> Hi,
>     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.
>     Thanks all.

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