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@data

Posted on 2000-03-21
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Last Modified: 2010-03-05
I need to fill @data with information in the following format:

@data =([date1,date2,date3,date4],[1,2,3,4],[10,20,30,40]);

using a text file which is formatted as follows:

date1,1,10
date2,2,20
date3,3,30
date4,4,40

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Question by:benwilkinson
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7 Comments
 
LVL 2

Accepted Solution

by:
mattrope earned 200 total points
ID: 2643075
Would something like this work?

### Open file and read in the fields
open(F,"temp.txt") || die "Can't open.\n";
while($line = <F>) {
        chomp $line;
        ($field1, $field2, $field3) = split(/,/,$line);
        push @field1, $field1;
        push @field2, $field2;
        push @field3, $field3;
}
 

@data = (\@field1, \@field2, \@field3);
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LVL 1

Expert Comment

by:lambda
ID: 2643080

open (FILE, "Data.txt"); # path to text file.
@File = <FILE>;
close (FILE);

foreach $line (@File)
{
      ($first, $second, $third) = split (/,/, $line);
      push (@arrFirst, $first);
      push (@arrSecond, $second);
      push (@arrThird, $third);
}

@data = (@arrFirst, @arrSecond, @arrThird);
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LVL 2

Expert Comment

by:mattrope
ID: 2643094
The difference between my answer and lambda's is that my method will create a multidimensional array (an array of references to arrays) whereas lambda's will make a single array with all the data for the first field, followed by all the data for the second field, etc.  If you wanted a single dimension array, use lambda's code instead of mine.
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Author Comment

by:benwilkinson
ID: 2643103
Thanks - actually found the @data(\@1,\@2,\@3) technique seconds before the reply appeared.
Works perfectly for my needs

thnks again
0
 

Author Comment

by:benwilkinson
ID: 2643104
Thanks - actually found the @data(\@1,\@2,\@3) technique seconds before the reply appeared.
Works perfectly for my needs

thnks again
0
 
LVL 1

Expert Comment

by:lambda
ID: 2643331
mattrope :
If I had seen ur soln, I wouldn't have posted my own. Actually I saw it only after I did.
:-))
0
 
LVL 84

Expert Comment

by:ozo
ID: 2643344
while( <F> ){
   chomp;
   my $n = 0;
   for( split/,/ ){ push @{$data[$n++]},$_ }    
}
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