%樣本點(diǎn)數(shù)
N=5000;
[normal,Fs,bits] = wavread('normal',N);
[mitralstenosis,Fs,bits] = wavread('mitralstenosis',N);
[aorticinsufficiency,Fs,bits] = wavread('aorticinsufficiency',N);
[pulmonarystenosis,Fs,bits] = wavread('pulmonarystenosis',N);

figure(1);
%正常時(shí)心音波形
subplot(2,1,1);
plot(normal);
xlabel('樣本序號(hào) n/個(gè)');
ylabel('幅值 A/V');
title('正常時(shí)心音波形');
axis ([0 N -0.1 0.1]);

figure(2);
%大動(dòng)脈狹窄時(shí)心音波形
subplot(3,1,1);
plot(aorticinsufficiency);
% xlabel('樣本序號(hào) n/個(gè)');
ylabel('幅值 A/V');
title('大動(dòng)脈狹窄時(shí)心音波形');
axis ([0 N -0.2 0.2]);
%二尖瓣狹窄時(shí)心音波形
subplot(3,1,2);
plot(mitralstenosis);
% xlabel('樣本序號(hào) n/個(gè)');
ylabel('幅值 A/V');
title('二尖瓣狹窄時(shí)心音波形');
axis ([0 N -0.1 0.1]);

%肺動(dòng)脈瓣狹窄時(shí)心音波形
subplot(3,1,3);
plot(pulmonarystenosis);
xlabel('樣本序號(hào) n/個(gè)');
ylabel('幅值 A/V');
title('肺動(dòng)脈瓣狹窄時(shí)心音波形');
axis ([0 N -0.2 0.2]);