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How do I connect plot points with lines using ginput?

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Glenn Martinez
Glenn Martinez on 29 Feb 2016
Edited: Image Analyst on 29 Feb 2016
I am trying to program a function called draw_constellation. By using ginput,the user would click on the figure and a plot point will appear. Any subsequent plot points would be connected with a line. My problem is connecting the third point with the second point and so on. Currently, the code I have only plots the first two points with a line.
Here is what I currently have:
function[] = draw_constellations
axis([0 100 0 100]);
set(gcf,'color','k');
set(gca,'color','k');
axis square;
hold on;
while 1
[x,y,button] = ginput(1);
if button == 113
break;
else
hold on
plot(x,y,'w*')
end
[xn,yn,button] = ginput(1);
plot(xn,yn,'w*');
plot([x,xn],[y,yn],'w');
end

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Accepted Answer

David Young
David Young on 29 Feb 2016
The attached function should show you how to do what you need, though you will have to modify it for your purpose.

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