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If you provide fewer than N_rank
arguments,
the missing arguments will be filled in using the last provided argument.
However, for code clarity, it makes sense to provide all N_rank
parameters.
Taking a linear combination is
sufficient for dense, asymmetric arrays, such as are provided by the Blitz++
Array
class.
For example, certain bitmap formats store image rows from bottom to top rather than top to bottom.
From top to bottom: (1) using a list of array positions; (2) Cartesian-product indirection; (3) using a set of strips to represent an arbitrarily-shaped subset of an array.
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