Better data tip for Polar graph

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Trevor
Trevor 2011-8-7
回答： Mike Garrity 2016-5-12
Is there any way to make Matlab give polar coordinates when placing a data tip on a graph instead of Cartesian?
And really, why on earth does Matlab not do that in the first place?

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回答（3 个）

Oleg Komarov
Oleg Komarov 2011-8-8
At the end of the documentation of datacursormode you will find example on how to customze the text of the tip.
George Sterling
George Sterling 2016-5-12
编辑：George Sterling 2016-5-12
% This function changes data tips from cartessian to polar coords
function polar_datacursormode
dcm_obj = datacursormode(gcf); set(dcm_obj,'UpdateFcn',@myupdatefcn)
function txt = myupdatefcn(empt,event_obj) % Customizes text of data tips
pos = get(event_obj,'Position');
R = sqrt(pos(1)^2 + pos(2)^2);
Theta = atand(pos(2)/pos(1));
if Theta < 0 Theta = Theta + 360; end
txt = {['R: ' num2str®], ... ['Theta: ' num2str(Theta)]};
Mike Garrity
Mike Garrity 2016-5-12
The new polarplot function in R2016a does this for you.

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