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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! ( d4 S+ F7 o# X* d us=zeros(1,5000);' l: O- a. D2 p- z N s=rand(1,5000);, ]' }, u$ q, ?( t c5 `9 t9 e n=length(s);: {! t$ U3 p1 y0 t9 n$ s+ e max=0.0; ) {3 D. ]( M) ~' @' Hindex=0; & F% A; O1 H: L# k; P, N5 Nfor i=1:n ( C' A9 A! s( h5 E a% g! Tif max5 n9 Z5 I# F! g+ L1 lmax=s(i); 9 O8 @9 |* C hindex=i;9 l" @8 Y( {. Z' P% u, e else # z. X* C) i% I8 b) x0 r" S. u Zend{/ U ~6 c: a- k. j9 h" @ end( M \# `* v) u6 e" h. V1 f8 ~ small=100;N0 M$ @. G1 w0 ] wenergys=sum(s(index-small:index+small).^2);4 v( G4 E/ s* n) L middle=150;& A+ e) K/ z' ~, z2 { i% L- G wenergym=sum(s(index-middle:index+middle).^2);& L7 ~" z) U# O; P% G9 \' q large=200; 2 H: ~/ L6 S! Iwenergyl=sum(s(index-large:index+large).^2);# k9 m6 s) ?7 j6 }" u1 r/ i energy=sum(s.^2); ( E# ~( c9 C( I6 V3 I# d3 |ratios=wenergys/energy; ! m, a/ ?$ A% V5 Zratiom=wenergym/energy;% Z' X8 r/ K0 \6 X% u: R, P ratiol=wenergyl/energy;2 M3 ~5 R7 M" q0 a# I m=max*100000;+ v) G8 u9 U' C9 g ws=wenergys*100000; 7 f1 ?4 x1 y' h3 @5 v; `( `, f# }wm=wenergym*100000;+ s+ x/ N( j+ }, ~# p: M wl=wenergyl*100000;( |7 s$ V$ x) C! k& \ e=energy*100000; + W: d0 b9 a5 l% K5 {; w, R) D. K3 ta=[m,index,e,ws,wm,wl,ratios,ratiom,ratiol]; |
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