如何在Matlab中自定义轮廓线?

问题描述

我正在准备等高线图，应该在其中突出显示特定级别的等高线.例如，我的轮廓线值在-1和1之间，并且我想突出显示与值0相对应的线.我尝试使用以下过程来做到这一点，

I am preparing a contour map where I am supposed to highlight the contour line for a specific level. For Example, my contour line values are lying between -1 and 1 and I want to highlight the line corresponding to the value 0. I tried to do this using the following procedure,

[M,c]=contourf(longitude,latitude,delta',-1:0.2:1);
s=size(c.LevelList,2);
for i=1:s
  if (c.LevelList(i)==0)
  c.LevelWidth=2;
  end;
end;

但是，它对轮廓图没有任何作用.任何人都可以通过适当的程序帮助我吗?

However, it does nothing to the contour map. Can anyone please help me with the appropriate procedure?

推荐答案

我建议在所需的级别上简单地使用contour在初始contourf之后突出显示，例如:

I would suggest simply using contour on your desired levels to highlight after the initial contourf, like so:

% Input.
x = linspace(-2*pi, 2*pi, 101);
y = x + pi;
[X, Y] = meshgrid(x, y);
Z = 0.5 * (sin(X) + cos(Y));

% Levels to plot with contourf.
levelsf = -1:0.2:1;

% Levels to highlight.
levels = [0 0.3];

figure(1);
hold on;

% Contourf all levels.
contourf(X, Y, Z, levelsf);

% Highlight levels with simple contour.
contour(X, Y, Z, levels, 'r', 'LineWidth', 2);

hold off;

要突出显示levels = [0 0.3]，您将获得:

For highlighting levels = [0 0.3], you'll get:

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