hedge :: tools :: SubsettableCrossProduct :: Class SubsettableCrossProduct

Class SubsettableCrossProduct

A cross product that can operate on an arbitrary subsets of its two operands and return an arbitrary subset of its result.

Instance Methods

[hide private]

__init__(self, op1_subset=(True, True, True), op2_subset=(True, True, True), result_subset=(True, True, True))
Construct a subset-able cross product. source code

__call__(self, x, y, three_mult=None)
Compute the subsetted cross product on the indexables x and y. source code

Class Variables

[hide private]

full_subset = (True, True, True)

Method Details

[hide private]

init(self, op1_subset=`(`True`,` True`,` True`)`, op2_subset=`(`True`,` True`,` True`)`, result_subset=`(`True`,` True`,` True`)`)
(Constructor)

source code

Construct a subset-able cross product.

Parameters:

op1_subset - The subset of indices of operand 1 to be taken into account. Given as a 3-sequence of bools.
op2_subset - The subset of indices of operand 2 to be taken into account. Given as a 3-sequence of bools.
result_subset - The subset of indices of the result that are calculated. Given as a 3-sequence of bools.

call(self, x, y, three_mult=None)
(Call operator)

source code

Compute the subsetted cross product on the indexables x and y.

Parameters:

three_mult - a function of three arguments sign, xj, yk used in place of the product sign*xj*yk. Defaults to just this product if not given.

Class SubsettableCrossProduct

__init__(self, op1_subset=(True, True, True), op2_subset=(True, True, True), result_subset=(True, True, True)) (Constructor)

__call__(self, x, y, three_mult=None) (Call operator)

init(self, op1_subset=`(`True`,` True`,` True`)`, op2_subset=`(`True`,` True`,` True`)`, result_subset=`(`True`,` True`,` True`)`)
(Constructor)

call(self, x, y, three_mult=None)
(Call operator)