Datastructure

• wp: Contains the entries from the tree in figure 5. If the input vector has length 2ⁿ, then wp is an n by 2ⁿ matrix. The rows contain the blocks from the tree in figure 5 in the order they are shown.
• sel: An uint8 (incidence) matrix the same size as wp, entries are either 0 or 1 (wpa1 always returns all zeroes, the entries are changed when a basis is selected). A 1 means the corresponding entry in wp is to be included in the basis, 0 that it is left out.

• bestbase: Best basis, i.e., lowest cost basis, with respect to a cost function (see below).
• bestlevl: A fixed level (with lowest cost) is chosen from the tree, i.e., all blocks are from the same row in figure 5.
• fixlevel: A fixed user specified level.
• wavbasis: Wavelet basis.
• showwp: This program allows the user to interactively select the basis (see below).

Footnotes

...wpa1⁶

wpa1 is restricted to input vectors whose length is a power of two.