I have a 17 MB CSV file that needs to be parsed. So I parsed the CSV file and saved it as multidimensional array 
while (my $line = < $in_ph > ) {
    chomp $line;
    my@ fields = split(/,/, $line);@
    key = split(/_/, $fields[0]);
    $data[$count][0] = $fields[1];
    foreach(@key) {
        $data[$count][$k + 1] = $key[$k];
        $k++;
    }
    $k = 0;
    $count++;
}

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I know need to access only certain elements of each row and column. I am running out of memory during this action. Please help me out with this 
my $n = 2033;
my $color = $data[$n][0];
my $order = $data[$n + 1][0];
my $shape = $data[$n + 3][0];
my $name = $data[$n + 4][0];
foreach my $aref(@data[2033..$#data]) {
    if (($aref - $n) % 6267 == 0) {
        $color = $data[$aref][0];
        $order = $data[$aref + 1][0];
        $shape = $data[$aref + 3][0];
        $name = $data[$aref + 4][0];
    }
    print $out_ph1 $predata, ",", $color, ",", $order, ",", $shape, ",
+", $name, ",";
    foreach(@{
        $aref
    }[4..$#$aref]) {
        print $out_ph1 $_, "\_";
    }
    print $out_ph1 "\n";
}

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I need parse data from row 2033 onwards. I have initialised my color, order, shape and name to certain values from my @data. I know have a for loop that traverses from row 3022 to the end of @data. After every 6267 rows traversed, I want to change the value of color, order, shape and name. I am using the if loop for the same. At the same time, I want color, order, shape and name joined with data from column 4 onwards for each row. I keep getting the warning use of uninitialized value in join for the below line 
print $out_ph1 $predata, ",", $color, ",", $order, ",", $shape, ",", $
+name, ",";

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I am also running out of memory before the loop completes. Please help me! I am not sure if the way I have parsed the CSV file is causing this or if the way I am displaying this is.

In reply to Running out of memory while running this for loop by Ppeoc

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