How can I draw a vertical line upon the horizontal lines in matlab?

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sufian ahmed 2017-5-23

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https://ww2.mathworks.cn/matlabcentral/answers/341480-how-can-i-draw-a-vertical-line-upon-the-horizontal-lines-in-matlab

回答： KSSV 2017-5-23

I want to draw a vertical line in Matlab upon the concurrent horizontal lines and show the coordinates where the vertical line intersects the horizontal lines.I give a figure here, I want to write a code so that it draws a line first and show the co-ordinates on the intersection point automatically.

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sufian ahmed 2017-5-23

编辑：sufian ahmed 2017-5-23

bro i dont know. but after hough transform i get some horizontal lines. now i want to apply a algorithm so that a vertical line flows from left to right and mark the intersection point when it intersects with the image horizontal lines.It also great for me if it shows the co-ordinates on the intersection point.

KSSV 2017-5-23

编辑：KSSV 2017-5-23

I gave you code on how to show intersection points in stackoverflow already. :)

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Answer 1

KSSV 2017-5-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/341480-how-can-i-draw-a-vertical-line-upon-the-horizontal-lines-in-matlab#answer_268031

在 MATLAB Online 中打开

L1 =  [0.7290    0.2163
    0.2026    0.9763] ; % line 1 coordinates 
L2 =   [0.5932    0.9677
    0.3044    0.8960] ;  % line 2 coordinates 
figure(1)
hold on
plot(L1(1,:),L1(2,:),'r')
plot(L2(1,:),L2(2,:),'b')
%%Get intersection
P = InterX(L1,L2) ;
%
plot(P(1),P(2),'*r')
%%Show points
text(P(1),P(2),num2str(P)) ;