Question

matlab中如何画横坐标不均匀的三维图

大家好，怎么样才能画出类似于上面这个图的三维图呢，我的x,y坐标都是不均匀的，都是取0.0001, 0.001, 0.01, 0.1, 1，然后z坐标是对应的取值，不知道该怎么画，谢谢大家指点！！也就是说每个x,y对应一个z值，如下表所示：





Answer 1

r=log10([0.0001 0.001 0.01 0.1 1]);
[x y]=meshgrid(r);
z=[0.3899 0.3829 0.3748 0.3820 0.3884;
    0.3842 0.3707 0.3692 0.3767 0.3847;
    0.3737 0.3659 0.3514 0.3730 0.3739;
    0.3851 0.3781 0.3641 0.3867 0.3802;
    0.3886 0.3801 0.3712 0.3890 0.3879];
C=(z(1:end-1,:)+z(2:end,:))/2;
C=(C(:,1:end-1)+C(:,2:end))/2;
surfc(xx,yy,z,C);
set(gca,'xticklabel',num2str(r','1E%i'));
set(gca,'yticklabel',num2str(r','1E%i'));

追问

太有用了！非常感谢您！还想再请教您一下，我想让图中间再平滑一些，就像我问题当中的那个图一样，这样子会把图的变化趋势显示地清晰一些，这个该怎么做呢？

追答

数据量不足，要画得好看一些就要插值，获得多一些数据

r=log10([0.0001 0.001 0.01 0.1 1]);
[x y]=meshgrid(r);
z=[0.3899 0.3829 0.3748 0.3820 0.3884;
    0.3842 0.3707 0.3692 0.3767 0.3847;
    0.3737 0.3659 0.3514 0.3730 0.3739;
    0.3851 0.3781 0.3641 0.3867 0.3802;
    0.3886 0.3801 0.3712 0.3890 0.3879];
[xx yy]=meshgrid(linspace(min(r),max(r),20));
zz=interp2(x,y,z,xx,yy);
C=(zz(1:end-1,:)+zz(2:end,:))/2;
C=(C(:,1:end-1)+C(:,2:end))/2;
surfc(xx,yy,zz,C);
set(gca,'xticklabel',num2str(r','1E%i'));
set(gca,'yticklabel',num2str(r','1E%i'));