NAME

       Statistics::Basic::_TwoVectorBase - base class objects like Correlation

METHODS

       query()
           Query the value of the object.  It will return the undefined value until there's
           something to calculate.

       insert()
           Insert two new new values into the vectors.  This function must be given precisely two
           arguments and probably shouldn't be undefined values in most cases.

               # insert a 4 in one vector and a 3 in the other
               $object_instance->insert( 4, 3 );

       append() ginsert()
           The growing insert inserts new elements, growing the max size of the vector to
           accommodate the new elements (if necessary).  This function must be given precisely
           two arguments and probably shouldn't be undefined values in most cases.

               # append a 4 in one vector and a 3 in the other
               $object_instance->ginsert( 4, 3 );

       query_size()
           The current size of the vectors -- regardless of their max size (as set by
           "set_size()").  This function returns a list, i.e.:

               my @s = $obj->query_size; # two values
               my $s = $obj->query_size; # the right hand value of the list

       set_size()
           Set the maximum size for the underlying Statistics::Basic::Vector objects.  This
           function requires two arguments.

       set_vector()
           Set the vector objects used to calculate the object's value.  This function takes two
           arguments -- which can either be arrayrefs or Statistics::Basic::Vector objects.  They
           must have the same number of elements.

               my $v1 = vector
               my $v2 = $v1->copy;
               $example_correlation->set_vector($v1, $v2);

OVERLOADS

       This class provides overloads.  If evaluated as a string, it will attempt to print a
       pretty value for the object (or "n/a", see "query()" above).  the resulting string can be
       tuned, in terms of precision, see ipres for further information.

       If evaluated as a number, it will try to return the raw result of "query()", possibly
       turning the resulting "undef" (if applicable) into a 0 in the process -- note that Perl
       does this 0-izing, not the overload.

       The "eq" and "==" operators are also overloaded, trying to do the right thing.  Also see
       toler for further information.

AUTHOR

       Paul Miller "<jettero@cpan.org>"

COPYRIGHT

       Copyright 2012 Paul Miller -- Licensed under the LGPL

SEE ALSO

       perl(1), Statistics::Basic, Statistics::Basic::Vector