keepbiggest.m

来自「老外写的小波变换的工具箱」· M 代码 · 共 19 行

function sparse = KeepBiggest(dense,N)
% KeepBiggest -- Kill (set to zero) all but N biggest elements
%  Usage
%    sparse = KeepBiggest(dense,N)
%
	ordered   = reverse(sort(abs(dense(:))));
	threshold = ordered(N);
	sparse    = dense .* (abs(dense) >= threshold);
    
    
 
 
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