在Matlab的轮廓图中选择特定级别 [英] Pick a specific level in the contour plot on matlab

问题描述

我有这个情节，它是我用来找出等高线图的测试的结果通常在matlab上工作.我试图找出是否有一种方法可以仅绘制其中一条线，而不必绘制第一条线.

I have this plot that I generated as a test of figuring out how contour plots work on matlab in general. I'm trying to figure out if there is a way I can plot just one of the lines but not necessarily the first line.

Matlab用这种方法解释是否这样做:

They way Matlab explains it is if you do:

 contour(X,Y,Z,1);

它将绘制其中一条线，但它始终是第一条线，但是对于我的特殊情况，我需要第三条或第四条线.在Matlab中有办法做到这一点吗?

it will plot one of the lines but it's always the first one, but for my particular case I want the 3rd or 4th one. Is there a way to do that in Matlab?

推荐答案

contour(Z,N)和contour(X,Y,Z,N)绘制N等高线，自动选择级别.这不是您想要的不是！

contour(Z,N) and contour(X,Y,Z,N) draw N contour lines, choosing the levels automatically. This is not what you want!

contour(Z,V)和contour(X,Y,Z,V)为向量V中指定的每个级别绘制一条轮廓线.使用contour(Z,[v v])或contour(X,Y,Z,[v v])绘制单级v的轮廓.

contour(Z,V) and contour(X,Y,Z,V) draw a contour line for each level specified in vector V. Use contour(Z,[v v]) or contour(X,Y,Z,[v v]) to draw contours for the single level v.

建议第3行和第4行的电平为7和8，您必须写contour(X,Y,Z,[7 7])仅绘制第3条线或contour(X,Y,Z,[7 8])绘制第3和第4条线.

Suggesting the levels of the 3rd and 4th line are 7 and 8 you have to write contour(X,Y,Z,[7 7]) to only plot the 3rd line or contour(X,Y,Z,[7 8]) to plot the 3rd and the 4th line.

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