MATLAB: Data cursor in MATLAB

contourfdata cursoreditMATLABselect text update function

Hi MathWorks staff and Matlab users. I work on Matlab 2013a software. Main file is "question.m". I have problem with Data cursors.
When i place data cursor on contourf plot i see both 2 coordinates and amplitude level (i. e. z-value ) of the point and everything is OK (see image "1"). But when i save Text Update Function (press "Edit Text Update Function", go to file- save as – "NewCallback.m") to my working directory and then try to open it (press "Select Text Update Function" and choose this new file "NewCallback.m" ) i earn only 2 numbers instead of 3 !!?? I earn only coordinates, but not amplitude.
Look at image "2__I selected text update function.png".
Question: How can i obtain all 3 coordinates of point using "NewCallback.m" (or another modified text update function)?
Thanks in advance!!

Best Answer

Hello everybody. I think, i've overcomed this problem. Answer on this page
http://stackoverflow.com/questions/21523074/contourf-plots-datacursor-how-can-i-take-level-value?s=1|9.4264
helped me very much. I modified code i've found there.
After contourfplot i write
     datacursormode on;
     dcm_obj = datacursormode(gcf);
     set(dcm_obj,'DisplayStyle','datatip',...
    'UpdateFcn',@myfunction);
My text update function is
    function output_txt = myfunction(obj,event_obj)
   global d_theta d_phi; %Theta and phi angle steps
   % Display the position of the data cursor
   % obj          Currently not used (empty)
   % event_obj    Handle to event object
   % output_txt   Data cursor text string (string or cell array of strings).
   pos = get(event_obj,'Position');
   val_X=pos(1);
   val_Y=pos(2);
   h=get(event_obj,'Target'); 
   %  We can go other, more time consuming way
   % X=get(h,'XData'); 
   % Y=get(h,'YData'); 
   %   [i_1,i_2]=find((X==val_X) & (Y==val_Y)).
   %  But i can find locations of the array elements
   %more easily, as far as i made it by myself
   %~~~~~~ Polar coordinate Theta ~~~~~~

   Theta_angle=sqrt(val_X^2+val_Y^2);% in degrees !!!
   %~~~~~~ Polar coordinate Theta ~~~~~~
   i_1=Theta_angle/d_theta+1;
   i_1=round(i_1);%
   %~~~~~~ Polar coordinate Phi ~~~~~~
   Phi_angle=atan(val_Y/val_X);
   if (val_X<0)&&(val_Y>=0)
  Phi_angle=pi+Phi_angle;
   elseif (val_X<0)&&(val_Y<0)  
  Phi_angle=pi+Phi_angle;
   elseif (val_X>=0)&&(val_Y<0)   
  Phi_angle=2*pi+Phi_angle;
   end
   Phi_angle=Phi_angle*180/pi; % transform to degrees
   Phi_angle=round(Phi_angle*10)/10;%i need 1 decimal
   %~~~~~~ Polar coordinates Phi~~~~~~
   i_2=Phi_angle/d_phi+1;
   i_2=round(i_2);
   Z=get(h,'ZData');% read big array everytime i move datatip????
   Level=Z(i_1,i_2);
   output_txt = {[ 'Phi, deg=    ',num2str(Phi_angle,'%.1f')],... 
   [ 'Theta, deg= ',num2str(Theta_angle,'%.1f')],... 
   [ 'Level, dB=   ',num2str(Level,'%.2f')]}; 
   end
To view result open sticked file "result.png". I tried to stick data file "data_exhample_" (about 1 MB) to this message, but i can't. Error appears...
P.S.: After my attempts to attach 2 pictures to my message (I wanted to attach 2 pictures, but only one picture displayed correctly,) i was deprived of ability to attach files. I think, that my problems are because of old browser. There is limitation on this site: i can attach no more than 10 pictures in 24 hours.
P.S.2: I accepted this my answer by my old user account Marat Zhe :P
P.S.3: I finally attached 1 more image and data file..
                                      Image 1
                               Image 2
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