function draw_lines
figure('WindowButtonDownFcn',@wbdcb)
ah = axes('DrawMode','fast');
axis ([1 10 1 10])
function wbdcb(src,evnt)
if strcmp(get(src,'SelectionType'),'normal')
[x,y,str] = disp_point(ah);
hl = line('XData',x,'YData',y,'Marker','.');
text(x,y,str,'VerticalAlignment','bottom');drawnow
set(src,'WindowButtonMotionFcn',@wbmcb)
elseif strcmp(get(src,'SelectionType'),'alt')
set(src,'WindowButtonMotionFcn','')
[x,y,str] = disp_point(ah);
text(x,y,str,'VerticalAlignment','bottom');drawnow
end
function wbmcb(src,evnt)
[xn,yn,str] = disp_point(ah);
xdat = [x,xn];
ydat = [y,yn];
set(hl,'XData',xdat,'YData',ydat);
end
end
function [x,y,str] = disp_point(ah)
cp = get(ah,'CurrentPoint');
x = cp(1,1);y = cp(1,2);
str = ['(',num2str(x,'%0.3g'),', ',num2str(y,'%0.3g'),')'];
end
end
