matlab different datacursormode for each subplot

I want to plot 2 figures by using subplot

subplot 211 subplot 212

but I'd like to use different cursormode each subplot211 and subplot 212

for example For subplot 211, If I pick datacursormode, then data(X:-,Y:-,text:-) would be shown like this.

Theother subplot 212, If I pick datacursor, then the other data(X:-, K:-) should be shown.

I have no idea how to control each subplot using datacursormde

Please let me know good tip to solve this problem.

Answer 1

[Walter Roberson]

Unfortunately datacursormode is a figure property. Your code would have to figure out which subplot the cursor was over and change the output string as appropriate.

Answer 2

[Jasper van Casteren]

I use

fig = figure;
ax1 = subplot(whatever);
ax2 = subplot(whatever);
datacursor = datacursormode(fig);
datacursor.set('UpdateFcn',@MyFunc);
% MyFunc must be an embedded function to know ax1 and ax2
function MyFunc(Target, evtObj)
    if Target.Parent==ax1
        whatever;
    else
        whatever;
    end
end

Answer 3

[Spencer Rhodes]

Another way to do it:

set(datacursormode(gcf),'UpdateFcn',@(~,evt) timeheight_cursor_update(evt,AH1))

where AH1 is the axis handle of the subplot I want the cursor update function to be used in.

My timeheight_cursor_update function is then this:

function [txt] = timeheight_cursor_update(evt,varargin)
%TIMEHEIGHT_CURSOR_UPDATE Useful when wanting to inspect a time-height plot
%and see the actual dates/times instead of just the Matlab datenums.
%
% INPUTS
%   evt:        The event struct for the cursor click which holds the Target
%               and Position.
%   varargin:   If using subplots, can provide the one axis you want this
%               update function to apply to.  If you click the cursor in
%               any other subplot, it won't return.

if length(varargin) == 1
    % check if looking at provided axis
    if varargin{1} == evt.Target
        % good to go
    elseif isobject(varargin{1}) ...
            && ismember('Children',properties(varargin{1})) ...
            && varargin{1}.Children == evt.Target
        % also good to go
    else
        return; % cursor must be in a different axis, use default txt
    end
end
pos = get(evt, 'Position');
txt = {['Time: ' datestr(pos(1))], ...
       sprintf('Height: %.2f', pos(2))};

end

I'm not sure how to return Matlab's default tooltip, still looking into that. But at least this is a bit more elegant than what Jasper suggested, and you don't need a nested function, so it works in a script.

Best,

Spencer