在等高线图上叠加等高线

Question

我试图在另一个数据集的填充轮廓之上绘制一个数据集的轮廓线。单独绘制它们看起来都正确，但是当我以通常的方式将它们组合起来时，它们看起来不正确：

clc; clear all; close all;

x = linspace(-2*pi,2*pi);
y = linspace(0,4*pi);
[X1,Y1] = meshgrid(x,y);
Z1 = sin(X1)+cos(Y1);

[X2,Y2] = meshgrid(x,y);
Z2 = 1000*(sin(1.2*X2)+2*cos(Y2));

figure;
contourf(X1,Y1,Z1);
shading flat;

figure;
contour(X2,Y2,Z2,'k');

figure;
contourf(X1,Y1,Z1);
shading flat;
hold on;
contour(X2,Y2,Z2,'k');

Answer 1

要解决此问题，您必须使用 caxis 设置 contourf 绘图的限制：

clc; clear all; close all;

x = linspace(-2*pi,2*pi);
y = linspace(0,4*pi);
[X1,Y1] = meshgrid(x,y);
Z1 = sin(X1)+cos(Y1);

[X2,Y2] = meshgrid(x,y);
Z2 = 1000*(sin(1.2*X2)+2*cos(Y2));

figure;
contourf(X1,Y1,Z1);
shading flat;
caxis([min(min(Z1)) max(max(Z1))]);
hold on;
contour(X2,Y2,Z2,'k');

您可以将min(min(Z1)) 和max(max(Z1)) 替换为您想要的上限和下限。这导致了这个情节：