Hello all, I am a bit confused with the approach to nesting arrays. What my program does: randomly select a string with four elements from a data frame with 1553 strings, 1553 times and store the new order of these strings within an array or data frame. Then I would like to repeat this 1,000 times.

I have written this to output each rearranged assembly of 1553 strings into a separate output file because I do not understand how to store a matrix within a matrix. Could someone help explain the concept behind this idea? 

# Inputs

my $runs = 100000;        # 1e5 - the num of times we repeat the exper
+iment

# Program vars
my $i;                            # a looping variable
my $j;                            # another looping var
my $range = 1553;                         # the number of total window
+s with data
my $count = 0;                     # variable tracking pseudo X output
+ files


# Outer loop: Repeat "$runs" times 
for ($j = 0; $j < $runs; $j++) {

    for ($i = 0; $i < $range + 1 ; $i++) {
    
        # choose a randomly selected string    
        chomp @X_info;
        my @get_X = split('\s+', $X_info[int(rand($range))]);
    
        my $output_file = "/Users/statistical_analysis/pseudo_X/pseuo_
+X_"."$count".".txt";
        open (OUT, ">$output_file") or die "can't open output file";
        print OUT "@get_X\n";

    }
}
$count++;

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In reply to A Question with Nesting Arrays by ccelt09

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