http://demonstrations.wolfram.com/HaarFunctions/
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration shows the Haar functions psij, k(x), defined on the unit interval 0lt=xlt=1 for integers j, k, where jgt=0 and 0lt=klt=2^j - 1. They form a complete orthogonal set on 0lt=xlt=1 and constitute the simplest type of wavelet.
Contributed by: Peter Falloon
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