draw lines based on coordinates

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Locks
Locks 2014-11-17
评论： Siam 2014-11-17
Hi,
I am looking for a way to add a line to a convex function based on the coordinates.
I have a convex funtion going from x=1, y=19.99 to x=17, y=18.57. How is it possible to draw a straigt line between those two coordinates?
Thank you very much for the help!

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Siam
Siam 2014-11-17
You can try this to draw the line
x = [1 17];
y= [19.99 18.57];
line(x,y,'Color','r','LineWidth',4)
You can change the color as 'r' is for red and line width as well which is 4 for this case.
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Locks
Locks 2014-11-17
Just a small cicle at the beginning and the end of each line, as i tried to do it manually on the Picture. In Addition, also one in the middle, I'd like to Show that for a convex function the straight line is above the curved one.
Siam
Siam 2014-11-17
Please open a new question and provide some more information with a demo image if possible.

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