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

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,.

Answer 1

[KSSV]

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)

[Asatur Khurshudyan]

Hi, thank you for your answer. However, as I stated in the question, I want to draw the line directly on the figure. Not plot, but draw. Click at one point and move the mouse to the second point to draw the line.

[KSSV]

Read about imline, drawline functions.

[Asatur Khurshudyan]

Thanks, drawline is exactly what I was searching for.

[Asatur Khurshudyan]

It could be more useful if you edit the answer and add the drawline there.