www.pudn.com > huffman.rar > huffman_bench2.m

function [dims,times_c,times_d,isOK] = huffman_bench2 
%HUFFMAN_BENCH2 
%   This is a bench file about compression-decompression of random data 
%      sized 1000,2000,5000,10000,20000,50000,100000,200000,500000. 
% 
%   [dims,times_c,times_d,isOK] = huffman_bench2 returns four vectors sized N, 
%      being N the number of total tests: 
%         dims: lenght of vector used for each test 
%      times_c: time spent to compress 
%      times_d: time spent to decompress 
%         isOK: 1 if test is ok 
 
 
%   $Author: Giuseppe Ridino' $ 
%   $Revision: 1.0 $  $Date: 02-Jul-2004 16:47:25 $ 
 
 
% vector lengths 
dims = [1000,2000,5000,10000,20000,50000,100000,200000,500000]; 
 
% initialize elapsed times 
times_c = zeros(size(dims)); 
times_d = zeros(size(dims)); 
isOK = zeros(size(dims)); 
 
fprintf('\n'); 
for index = 1:length(dims), 
    % create vector 
    data = uint8(256*rand(1,dims(index))); 
    fprintf('size: %i   compressing: ',dims(index)); 
    % compress 
    tic 
    [zipped,info] = norm2huff(data); 
    times_c(index) = toc; 
    fprintf('%g   decompressing: ',times_c(index)); 
    % decompress 
    tic 
    unzipped = huff2norm(zipped,info); 
    times_d(index) = toc; 
    fprintf('%g   isOK: ',times_d(index)); 
    % check results 
    isOK(index) = isequal(data(:),unzipped(:)); 
    fprintf('%i\n',isOK(index)); 
end