Draw a line between two points on plotted data and compute its length

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Asatur Khurshudyan 2020-5-21

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https://ww2.mathworks.cn/matlabcentral/answers/529233-draw-a-line-between-two-points-on-plotted-data-and-compute-its-length

评论： Asatur Khurshudyan 2020-5-22

采纳的回答： KSSV

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Hi All,

Suppose we have a set of 2D points:

px = [1, 2, 5];
py = [1, 2, 1.5];

When we plot these points, we get 3 distinct points:

plot(px, py, 'r*')

Is it possible to draw a line connecting any two of those directly on the figure and measure the Euclid distance between them?

Regards

Edit

I don't need to PLOT a line. I need to click at one point and move the mouse to the second point to draw the line and measure the Euclidean distance between them,.

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采纳的回答

KSSV 2020-5-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/529233-draw-a-line-between-two-points-on-plotted-data-and-compute-its-length#answer_435408

在 MATLAB Online 中打开

px = [1, 2, 5];
py = [1, 2, 1.5];
x = [px(1) py(1)] ; 
y = [px(2) py(2)] ;
z = [px(3) py(3)] ; 
plot3(x,y,z,'r')
d = sqrt(diff(x)^2+diff(y)^2+diff(z)^2)