Possibly your prototyping is wrong, since you are passing in arrayref's, not actual arrays. 
sub myCurveX($$$$$)

[download]

But why even use prototypes in the sub? 

#$my_exp = myCurveX(\@my_arx,\@my_ary,\@my_arz,$my_v1,$my_v2);

#sub myCurveX(){  # thanks to [jwkrahn] (below) for pointing out my co
+de sloppiness
sub myCurveX{  #correct.... no ()
 my ($arrayref1, $arrayref2,$arrayref3, $v1, $v2) = @_;
$arrayref1->[0] = 1;  #sets first element of @my_arx to 1

[download]
I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku ................... flash japh

In reply to Re: Passing three arrays to a subroutine by zentara
in thread Passing three arrays to a subroutine by jaichaud

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