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awk - getline from parametric file name

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# 1  
Old 06-15-2010
awk - getline from parametric file name
Hi!
I have an input file for an awk script that I need to split into several files and the process them separately line by line.
I have splitted the input file into the other files, that have been created correctly. But, since their names are parametric (i.e. output_1.txt, output_2.txt.. output_3.txt), I have some problems in reading them line by line using getline. Here is my code

Code:
RS="new";
FS="\n";
    while (getline < ARGV[1] ){
            if (NF > 1){ 
                print $line > "output_"i".txt"
                close ("output_"i".txt");
            }
            i++;
    }
    numSamples=i;
    #process the single files created
    RS="\n";
    FS="  ";
    j=0;
    for (j=0;j<numSamples;j++){
        file="output_"j".txt"
        getline < ($file)   #getline here cannot find the files
        print $line
        #then process a single line of the file I am reading...
    }

The input file is in the format:

HTML Code:
new
  900.00    0   879.58   998.00 
  900.00    1  1999.00   998.00 
  900.00    2   817.38  1002.00 
  900.00   12   687.10   998.00 
  900.00   13     6.67  1002.00 
  900.00   14   287.47  1002.00 
  900.00   15  1317.82   998.00 
  900.00   16   531.71  1002.00 
new
  936.85    0  1695.27   998.00 
  936.85    1  1736.01  1002.00 
  936.85    2     1.00  1002.00 
  936.85    3  1431.56   998.00 
  936.85    4  1999.00   998.00 
  936.85    5  1993.92   998.00 
  936.85    6  1965.63   998.00 
  936.85    7  1556.24  1002.00 
  ...
Any idea on alternatives to getline in reading line by line the different files? What is wrong with my code? Thank you very much!!
# 2  
Old 06-15-2010
Hi Alice236,

Welcome to this forum. There is no need to use getline. I am not sure if I fully understand why you would want to split the file and then subsequently read them again.. What is your desired end result?

As an example, you can split the input file without getline into several files like so:
Code:
awk 'NF==1{i++;next}{print>"output_"i".txt"}' infile

You could read and process those files like so:
Code:
awk '{print; process ...}' output_*.txt

This User Gave Thanks to Scrutinizer For This Post:
Alice236
# 3  
Old 06-15-2010
I need to split into several files because, apart from awk, I use them also for plotting some statistics.
I tried to use getline to read them because I didn't have any better idea (I am still trying to learn awk and I need a lot of practice, as you can see.. ;-))
Anyway.. thank you very much for your solution, you saved my thesis for today! :-)
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