Dear Monks,

The following bit of code: 

sub correlation {

  print "I am in the correlation subroutine";

  my ($x_ref, $y_ref) = @_;   

  print "\nWe are in the correlation subroutine\n\n";


 # print Dumper ($x_ref, $y_ref);

  print Dumper length($x_ref);
  print Dumper length($y_ref);


  my $lfit = Statistics::LineFit->new();
  $lfit->setData($x_ref, $y_ref);

  my ($intercept, $slope) = $lfit->coefficients();
  my $rSquared = $lfit->rSquared();

[download]
Gives me the following output: 
I am in the correlation subroutine
We are in the correlation subroutine

$VAR1 = 16;
$VAR1 = 16;
Length of x and y arrays must be equal! at rebuild.pl line 335
No valid data input - can't do regression at rebuild.pl line 337
No valid data input - can't do regression at rebuild.pl line 338

[download]
Why does it tell me 'that the Length of x and y arrays must be equal' when we know that the lengths are equal. ($VAR1 = 16; $VAR1 = 16;) -- see output.
When I use the:
print Dumper ($x_ref, $y_ref);
That seems fine also.

Update : I've just copied and pasted the array contents into Excel and it does seem that one array has one element more than the other. Sorry guys.

In reply to Correlation using Statistics::LineFit -- DISREGARD POST by Win

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