Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation
 
PerlMonks  

Re^7: A complicated file parsing and 2D array/matrix problem.

by Kenosis (Priest)
on Aug 27, 2012 at 20:15 UTC ( #990054=note: print w/ replies, xml ) Need Help??


in reply to Re^6: A complicated file parsing and 2D array/matrix problem.
in thread A file parsing and 2D array/matrix problem.

It may be best to work on the A.txt and B.txt data sets you showed. If you can create a script to generate the ORed results of those two matrices, then it's most likely that script will work with larger matrices.

First, always begin your scripts with either:

use strict; use warnings;

or

use Modern::Perl;

I prefer the latter, since it includes the former two pragmas--among other things.

You can use File::Slurp qw/read_file/; to read a file's contents into an array. The foreach() takes a list or array--not a scalar, like you've done. That would account for some of the errors.

Here's one way to approach the problem:

  1. Read both matrix files into arrays.
  2. The first element (row 0) of each array is identical, as it contains the column titles. Grab those and create the title string (like in the first script, but w/o sorting), and move to the next rows (1 .. n) of the two arrays.
  3. Split each row (1 .. n) of the two arrays into their elements, placing those elements into two element arrays. The zeroth element of these arrays contains the row label.
  4. Do an OR comparison between the two element arrays (1 .. n), and build an OR-result array for the table.
  5. Finally, build the table and print it.

The scripting that produced the first table should help with reading files and building the table.

Step through this scripting process, and then share what you've completed. A script can be created to produce the ORed output you need; it'll just take a little more work...


Comment on Re^7: A complicated file parsing and 2D array/matrix problem.
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://990054]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (7)
As of 2014-12-20 22:39 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    Is guessing a good strategy for surviving in the IT business?





    Results (99 votes), past polls