toon0563.m

来自「老外写的小波变换的工具箱」· M 代码 · 共 28 行

% toon0563 -- Fast Algorithm for Matrix Multiplication
%
%  The Beylkin-Coifman-Rokhlin method is to 
%      1.  Take the 2-d Wavelet Transform of the matrix
%   -> 2.  ``compress'' the 2-d wavelet transform
%      3.  ``stretch'' it into a nonstandard form
%      4.  apply the nonstandard form by matrix multiplication.
%
%  How many non-negligible vales in WT ?
%
	figure;
	worder = sort(abs(wmat(:)));
	plot(log(reverse(worder)+eps))
	title('log(sort(abs(NS[Matrix])))')
	xlabel('Ordered Coefficient'); ylabel('log(size(coefficient))');
    
    

    
 
 
%
%  Part of Wavelab Version 850
%  Built Tue Jan  3 13:20:43 EST 2006
%  This is Copyrighted Material
%  For Copying permissions see COPYING.m
%  Comments? e-mail [e-mail]