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Better data tip for Polar graph

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Trevor il 7 Ago 2011
Risposto: Mike Garrity il 12 Mag 2016
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?

Risposte (3)

Oleg Komarov
Oleg Komarov il 8 Ago 2011
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 il 12 Mag 2016
Modificato: George Sterling il 12 Mag 2016
% 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 il 12 Mag 2016
The new polarplot function in R2016a does this for you.


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