Rank-Order Filter 1.0

y = RankOrderFilter(x, window, thd) runs a rank-order filtering of order N on x. y is the same size as x. If x is a matrix, RankOrderFilter operates along the columns of x.Rank-order filter calculates the p'th percentile of the data on an N sized window round each point of x. p can be a number between 0 and 100. To avoid edge effects, the x is expanded by repeating the first and the last samples N/2 times.When p is equal to 50, the output of this function will be the same as MATLAB's MEDFILT1(x,N); however, RankOrderFilter is almost always much faster and needs less memory.When p is close to 0 (or to 100), a RankOrderFilter calculates an approximate lower (or upper) envlope of the signal.

Requirements:	No special requirements
Platforms:	Matlab
Keyword:	Approximate,  Close,  Envlope,  Equal,  Faster,  Function,  Lower,  Matlab,  Medfilt,  Output,  Repeating,  Samples,  Signal,  Timeswhen,  Upper
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