[英]Matlab: I have two points in a 3D plot and i want to connect them with a line
I have a 3D plot and two points coordinates A(0,0,0) and B(13,-11,19). 我有一个3D图和两个点坐标A(0,0,0)和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.
我只是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,但我试过的一切都失败了。
Here's how: 这是如何做:
% 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))
Admittedly, this might seem a bit counter-intuitive at first, but in the long run it'll make sense. 不可否认,一开始这看起来有点反直觉,但从长远来看,这是有道理的。
If you read doc plot
or doc line
, you'll see that each expects sets of x
, y
and z
data, respectively. 如果您阅读
doc plot
或doc line
,您会看到每个都分别需要x
, y
和z
数据集 。 That is, using 也就是说,使用
plot3(X,Y,Z)
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
. 使用
X
, Y
和Z
一些矩阵, plot3
将从第一个三元组 ( X(1) Y(1) Z(1)
)到第二个三元组( X(2) Y(2) Z(2)
)绘制一条线等等 - line
相同。
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