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下面是我编的M文件的程序,主要是求一维数组s的最大值和索引位置,然后加不同宽度的窗,求出窗里信号能量后与总能量求比值。我编的程序中s是小波包分析的高频信号,为了简化程序段,我用5000个随机数来代替。编译的时候for循环好像根本就没有执行,不知道是为什么。请前辈们帮忙看看,不胜感激!8 F3 V- t# r' q! i
s=zeros(1,5000);- h+ e* Q4 {2 x! h
s=rand(1,5000);
6 d$ p: ~1 |3 B% |; u% en=length(s);
" a' O0 R; Q7 Umax=0.0;3 s) X# T1 l2 }
index=0;
4 q' b9 o/ C% b2 H! E4 Ofor i=1:n
# ~, f: g, D+ S; b: n, E if max<s(i)) F S$ M: `& T0 y- c
max=s(i);& R6 X M# R! R! c
index=i;
2 ]# i0 s# o! N8 J, [ else! W* y3 p: F' n$ A2 g. l
end# J0 H! p5 K7 a& ]- e% l1 S( _) I$ X
end
7 c2 r: z: q: [3 A: Ismall=100;
' [" c" K6 r5 }5 i- }, A4 b7 cwenergys=sum(s(index-small:index+small).^2);
. T8 _7 Q6 }) Q S& v9 Wmiddle=150;; X* E: B) k/ ]3 |
wenergym=sum(s(index-middle:index+middle).^2);. Y( ]' c1 H2 R- U9 @: v9 G% b
large=200;
3 H/ H: M. X2 ?8 M# _6 x1 e/ wwenergyl=sum(s(index-large:index+large).^2);
0 m! P" } c/ F* oenergy=sum(s.^2);4 g2 K9 p, L6 \
ratios=wenergys/energy;
3 ^7 Z$ _1 Z; A4 \ratiom=wenergym/energy;
9 j- `( U2 J p: [3 F7 P; rratiol=wenergyl/energy;
5 ~/ n4 h0 M/ A! k- N" w% lm=max*100000;
' E$ s6 a( r; M* S: iws=wenergys*100000; q0 F- v3 q9 v! I. a, I
wm=wenergym*100000; c6 h4 K" B/ B i5 u: \& p ~
wl=wenergyl*100000;
7 x2 B, Q$ D* X% Ze=energy*100000;
3 q Y' _$ n* }/ a8 N- ka=[m,index,e,ws,wm,wl,ratios,ratiom,ratiol]; |
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