[求助]maltab程序错误 大虾近来帮忙 谢谢

[285762505]

语音信号FFT频谱分析与显示
=================
function spgram(swavefilenam,winsiz,shift,base,coltype);
swavefilenam='voice.wav'
[signl,fs]=wavread(swavefilenam);
nseg=floor((length(signl)-winsiz)/shift)+1;
a=zeros(winsiz/2+1,nseg);
for i=1:nseg
n1=(i-1)*shift+1;n2=n1+(winsiz-1);
xx=signl(n1:n2);xx=xx.*hamming(winsiz);
y=fft(xx);y=y(1:winsiz/2+1);
y=y.*conj(y);y=10*log10(y);a(:,i)=y;
end
l1=(a>base);l0=(a<base);b=a.*l1+base*l0;
c=(b-base)./(max(max(b))-base);
y=[0:winsiz/2]*fs/winsiz;x=[0:nseg-1]*shift;
if coltype==1 colormap(hot);
else
mycoltype=gray;mycoltype=mycoltype(64:-1:1,;
colormap(mycoltype);
end
imagesc(x,y.c);axis xy;
=================
在MATLAB程序提示符下运行：
>>spgram(voice,256,64,0,0);
生成声音文件后还是错误　在c=(b-base)./(max(max(b))-base);这句里的．／上　　可能是矩阵什么的错误　　
本人不才　大家多多帮忙