How to select the x-value of the maximum of a figure (without using ginput)?

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Sam
Sam 2014-12-23
编辑： Sean de Wolski 2014-12-23
I've got a figure (see attachment). I want to select the x-value of it's maximum. How do I do this?

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Star Strider
Star Strider 2014-12-23
I would use the max function with two output arguments, then use the index value to find the x-value:
[ymax,idx] = max(y);
xmax = x(idx);

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Sean de Wolski
Sean de Wolski 2014-12-23
编辑：Sean de Wolski 2014-12-23
You could use datacursortmode the axes 'ButtonDownFcn' or max() on the line's 'YData'. This is what I would do.
plot(rand(1,10));
hLine = findobj(gca,'type','line');
[~,idx] = max(hLine.YData)
hLine.XData(idx)

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