slidefun
R = SLIDEFUN(FUN, W, V) evaluates the function FUN to a moving window of W consecutive elements of the vector V.
The function FUN is specified by a function handle or a function name and should return a scalar for a vector input. W specifies the size of the window and should be a positive integer. At the two edges of the vector less than W elements will be used. R will have the same size as V.
Effectively SLIDEFUN applies the function FUN to a moving window of consecutive elemens V(x0:(x0+W)) using FEVAL, and returns the result in R(x).
The window [x0:(x0+W)] is relative to the current point x in V. R = SLIDEFUN(FUN, W, V, WINDOWMODE) denotes the type of windowing being used: central (default), backward and forward.
R = SLIDEFUN(FUN,W,V,WINDOWMODE, P1,P2,...) provides for aditional parameters which are passed to the function FUN.
Example 1) Sliding max filter - return the maximum of every three consecutive elements:
V = [1 2 3 9 4 2 1 1 5 6] ;
R = slidefun(@max, 3, V)
% -> [2 3 9 9 9 4 2 5 6 6]
% So R(i) = max(R(i-1:i+1)) ;
% and R(1) = max(V(1:2))
More examples are provided in the help section.
Part of it's functionality has been implemented in base matlab (e.g. by movsum, movmean)
Citation pour cette source
Jos (10584) (2024). slidefun (https://www.mathworks.com/matlabcentral/fileexchange/12550-slidefun), MATLAB Central File Exchange. Récupéré le .
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Version | Publié le | Notes de version | |
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5.0.0.0 | removed feval calls, updated help |
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1.1.0.0 | fixed narginchk warning, treat V always as a vector even when it is a matrix |
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1.0.0.0 | can now handle (anonymous) funtion handles properly |