Matlab:我在 3D 图中有两个点，我想用一条线将它们连接起来 [英] Matlab: I have two points in a 3D plot and i want to connect them with a line

问题描述

我有一个 3D 图和两点坐标 A(0,0,0) 和 B(13,-11,19).我只想绘制一条连接这两点的可见线......我尝试了 plot3(0,0,0, 13,-11,19) 和其他东西，但我尝试的一切都失败了.

I have a 3D plot and two points coordinates A(0,0,0) and B(13,-11,19). I just want to plot a visible line connecting this two points ... I tried plot3(0,0,0, 13,-11,19) and other stuff but everything i tried failed miserably.

推荐答案

方法如下:

% Your two points
P1 = [0,0,0];
P2 = [13,-11,19];

% Their vertial concatenation is what you want
pts = [P1; P2];

% Because that's what line() wants to see    
line(pts(:,1), pts(:,2), pts(:,3))

% Alternatively, you could use plot3:
plot3(pts(:,1), pts(:,2), pts(:,3))

诚然，这乍一看似乎有点违反直觉，但从长远来看，这是有道理的.

Admittedly, this might seem a bit counter-intuitive at first, but in the long run it'll make sense.

如果您阅读doc plot 或doc line，您会看到每个都期望sets x, y 和 z 数据，分别.也就是说，使用

If you read doc plot or doc line, you'll see that each expects sets of x, y and z data, respectively. That is, using

plot3(X,Y,Z)

使用X、Y 和Z 一些矩阵，plot3 将从第一个triplet (X(1) Y(1) Z(1)) 到第二个三元组 (X(2) Y(2) Z(2)>) 等等 -- 与 line 相同.

with X, Y and Z some matrices, plot3 will draw a line from the first triplet (X(1) Y(1) Z(1)) to the second triplet (X(2) Y(2) Z(2)) and so on -- same for line.

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