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application, example, fft, graphics, gui

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16 Jul 2008		Sound Card Spectral Analyser GUI Acquire data from soundcard and plot in time and frequency domains Author: Rodney Thomson	example, application, fft, soundcard, object oriented, gui	18	0

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28 Mar 2009		fft fft code written my me Author: ustc huan	fft, signal processing	1	2	1.0 1.0 | 2 ratings
16 Jul 2008		Sound Card Spectral Analyser GUI Acquire data from soundcard and plot in time and frequency domains Author: Rodney Thomson	example, application, fft, soundcard, object oriented, gui	18	0

Comments and Ratings Matching Getnet's Watch List			1-2 of 2
Date	File	Comment by	Comments	Rating
30 Mar 2009	fft fft code written my me	Hal 9000	This file is full of garbage. How is this supposed to run?	1
30 Mar 2009	fft fft code written my me	Duane Hanselman	Why is the Database Toolbox required? Here is what is in this file: function xn=myfft(x) N=length(x);%È¡Êý×鳤¶È M=log2(N);%ÇóÊý×鳤¶ÈÒÔ2Ϊµ×µÄÃÝ %´Ë´¦½«Êý×éxÅÅÐò³Éxtmp %»ù±¾Ë¼Ï룺½«Ã¿Î»x(i)ÖеÄiµÄÖµ»»Ëã³É2½øÖÆ£¬Ã¿´Î½«×îµÍλȡ³ö±£´æµ½³¤¶ÈΪMµÄÊý×éÖÐ %¸ÃÊý×éµÄ´ÓµÚMλµ½µÚ1λÅÅ¿ª¾ÍÊÇÅÅÐòºóµÄλÖõĶþ½øÖƱíʾ %½«¸ÃÊý×é»»Ëã³ÉÊ®½øÖƵÄÊý¾ÍÊÇÐòÊýÖØÅźóµÄÐòÊýpos£¬ÔÙ½«x(i)¸³Óèxtmp(pos) %ÓÉÓÚmatlabÖÐÊý×é´Ó1¿ªÊ¼£¬¹ÊӦΪx(pos+1)=x(i+1) xtmp=zeros(1,N); value=zeros(1,M); for i=0:N-1 repr=i; for t=1:1:M repr=bitshift(i,1-t); value(t)=bitand(repr,1); end pos=0; for k=1:1:M pos=pos+value(k)*2^(M-k); end xtmp(pos+1)=x(i+1); end %xtmp=x; %fftÖ÷º¯Êý %Ö÷Ҫ˼Ï룺¹²ÓÐM²ã¼ÆËã %ÿ²ã°üÀ¨width¿é¼ÆË㣬ÿ¿é¼äÏà¾à2^iµÄ¾àÀ루iΪµÚi²ã£© %ÿ¿é¼ÆËã°üÀ¨deepth¸öµûÐÎÔËËã for i=1:M deepth=2^(i-1); width=2^(M-i); for t=1:2^i:N for k=1:deepth tmp=xtmp(t+k-1); wn=width*(k-1); xtmp(t+k-1)=tmp+exp(-j*2*pi*wn/N)*xtmp(t+k+deepth-1); xtmp(t+k+deepth-1)=tmp-exp(-j*2*pi*wn/N)*xtmp(t+k+deepth-1); end end end xn=xtmp;	1