Endpoints of drawline()

Hi all,

I'm trying to record the endpoints of the drawline() function in an array so I could record the distance. Is there a way to do this? Or is there a better way to draw a line and record the endpoints' coordinates/ calculate the distance between the endpoints?

Thanks!

[dpb]

https://www.mathworks.com/help/matlab/ref/drawline.html

"The page you were looking for does not exist."

There is no drawline function in MATLAB or any of the documented toolboxes.

As a practical matter, how are you going to draw a line without knowing the endpionts already?

[azhao]

I was referring to the ROI commands

https://www.mathworks.com/help/images/ref/drawline.html

[dpb]

TMW needs to fix their search engine -- search of all documentation didn't find a reference to drawline

[Walter Roberson]

drawline() shows up for me when I use the MATLAB search engine.

Note: in some cases, entries do not show up if you do not have access to the appropriate toolbox.

[dpb]

I grok that if search local installed doc, but in the online search as well? That truly sucks if they've done that on purpose.

[dpb]

Well, I don't know why didn't yesterday; today it did return the function reference...maybe something was momentarily offline yesterday when got the failure...

Answer 1

[Walter Roberson]

  h = drawline();
  
  ep = h.Position;
  x1 = ep(1,1); y1 = ep(1,2); x2 = ep(2,1); y2 = ep(2,2);

https://www.mathworks.com/help/images/ref/images.roi.line.html#mw_769df8d0-d040-4479-8389-eb506308ee3b

[azhao]

Thanks so much!