|
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!5 Q4 p2 m; F; M; g& Z9 ?( }; }) Y
s=zeros(1,5000);
* H2 v6 P P! i4 I/ r$ _$ ys=rand(1,5000);
" Y q" G' w- l% J% i2 d. bn=length(s);
0 H: `2 ~6 n( S* s3 r' {) Emax=0.0;0 {* k- y7 m. B0 W, T1 e
index=0;
7 Q; u4 o) T) Q6 c3 o& sfor i=1:n
- t9 Z& G9 S* P( _1 d if max<s(i)& T5 h0 E" g0 G3 h: g/ ] V, U
max=s(i);+ U% e% `0 S- A8 u# b
index=i;
1 z! D! {( i- E2 R8 Z* |; }$ q% v else
* Y/ ]" X5 k/ b end
4 k1 {, a- g/ N3 h% Tend
0 y, j/ }9 r, a: W- {small=100;
& k7 `2 R/ u7 C+ dwenergys=sum(s(index-small:index+small).^2);
. l" t6 l/ f8 o& ?middle=150;
- [5 \5 q* F* h2 Fwenergym=sum(s(index-middle:index+middle).^2);
& S( _. r9 N+ R" A* l2 u* slarge=200;+ a U, s6 l, V7 ?' o2 g
wenergyl=sum(s(index-large:index+large).^2);2 j" j* Z. a7 F
energy=sum(s.^2);
' }" o' o! n" i9 N0 O$ i3 ?ratios=wenergys/energy;2 D+ j6 \! i& T
ratiom=wenergym/energy;! y9 L! s# x9 h A6 x9 ^
ratiol=wenergyl/energy;
. l2 ?; l _2 w+ Y! }: Im=max*100000;
% j1 [& e' P$ E3 `; d& t1 ows=wenergys*100000;
- ~5 D: K. T0 pwm=wenergym*100000;
3 \/ ]2 E$ Q, q. O/ _2 ], X) kwl=wenergyl*100000;
. B$ j/ n! B. H3 r xe=energy*100000;
* ?2 N2 X2 d6 j- Aa=[m,index,e,ws,wm,wl,ratios,ratiom,ratiol]; |
|