Code covered by the BSD License  

Highlights from
Rank-Order Filter

Be the first to rate this file! 22 Downloads (last 30 days) File Size: 1.73 KB File ID: #22111

Rank-Order Filter

by

 

Rank-Order filtering for 1D signals

| Watch this File

File Information
Description

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.

MATLAB release MATLAB 7.6 (R2008a)
Tags for This File   Please login to tag files.
Please login to add a comment or rating.

Contact us