Matlab绘制平滑曲线图

%曲线图code:
x=[1 2 3 4 5 ];
y1  =[ 57.9 75.7 76 80.2  97];
y4=[ 90.9 95 95 97.4  99];
y8 =[65.5 82 84 91.3 95];
plot(x,y1,‘-.rv‘,x,y4,‘--ks‘,x,y8,‘:mp‘);
legend(‘method1‘,‘method2‘,‘method3‘);
set(gca,‘xtick‘, x_Matrix)
xlabel(‘number‘);
ylabel(‘Recognition rates(%)‘);

%连续曲线图

 x=[1 2 3 4 5 ];
y1  =[ 57.9 75.7 76 80.2  97];
y4=[ 90.9 95 95 97.4  99];
y8 =[65.5 82 84 91.3 95];
values1=spcrv([[x(1) x x(end)];[y1(1) y1 y1(end)]],3,1000);
values4=spcrv([[x(1) x x(end)];[y4(1) y4 y4(end)]],3,1000);
values8=spcrv([[x(1) x x(end)];[y8(1) y8 y8(end)]],3,1000);
plot(values1(1,:),values1(2,:),values4(1,:),values4(2,:),values8(1,:),values8(2,:)) ;