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下面是我編的M文件的程序,主要是求一維數(shù)組s的最大值和索引位置,然后加不同寬度的窗,求出窗里信號能量后與總能量求比值。我編的程序中s是小波包分析的高頻信號,為了簡化程序段,我用5000個隨機數(shù)來代替。編譯的時候for循環(huán)好像根本就沒有執(zhí)行,不知道是為什么。請前輩們幫忙看看,不勝感激!
* P. d4 L5 t* m) Ws=zeros(1,5000);: Z6 v3 v0 \8 L0 J( d1 |
s=rand(1,5000);; X+ Q$ E' r) t9 m9 L" `
n=length(s);
( z( @8 M. V( H. @+ Nmax=0.0;3 Z" j& O2 {, D% _) k `
index=0;
" E# S# W# S+ O' Dfor i=1:n7 Q0 ^0 X3 e t; V
if max<s(i)
) S) u4 P: m, D+ d/ d* \ max=s(i); l" g: N/ _0 n, y9 ~2 x3 J
index=i; , e6 D; k# H& {1 p3 a
else' u& ^9 U- X: \1 j; d
end
# x+ l0 V+ U, V* P' p* t/ {end
, N2 H- D3 w! G! K, L" osmall=100;
& O F/ i2 K8 X) d, u4 l/ I% Lwenergys=sum(s(index-small:index+small).^2);
, y0 ~& J% n, z8 T+ T1 t2 bmiddle=150;
; b& O2 b8 \- c0 rwenergym=sum(s(index-middle:index+middle).^2);9 h3 |, j6 h( [
large=200;
0 Q, O6 B. F5 N$ lwenergyl=sum(s(index-large:index+large).^2);; V+ l3 I* |% w# q( g
energy=sum(s.^2);+ b4 X/ o' \! V! I* `' ?
ratios=wenergys/energy;8 l! j5 }. H: S4 v) I
ratiom=wenergym/energy;
, w6 D. h; H: V8 l3 fratiol=wenergyl/energy;
' v* ~* g6 W* j5 N- Vm=max*100000;4 d0 {7 J1 h2 B, l/ X! O0 \
ws=wenergys*100000;; ~3 Y4 E6 E) b0 U4 i) Y3 M
wm=wenergym*100000;
6 D: Q" z$ q% Y6 O0 w( Ewl=wenergyl*100000;! W. S' O$ x' r: s( N9 l
e=energy*100000;
& R( ?2 ?$ y! _) ^/ ?a=[m,index,e,ws,wm,wl,ratios,ratiom,ratiol]; |
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