MATLAB: Displaying information about the data set by clicking on its plot and then show a value that is associated with the (x,y) point

datacursormodematlab guiplot

Hello,
So, I have a GUI and I'll plot a figure in this GUI. Then I want the user to be able to click somewhere on the curve, and then the information about that point will show up. I followed what was said here: https://www.mathworks.com/matlabcentral/answers/11668-displaying-information-about-the-data-set-by-clicking-on-its-plot
But, also, I want, aside from showing the x and y coordinates, to show another information that's associated with each (x,y) point. Like a (x,y) point indicated the value of z. Is it possible?
For example:
x = 
    0.0960    0.2496    0.4032    0.5568    0.7104    0.8640    
    1         2         3         4         5         6    
    7         8         9         10        11        12         
    13        14        15        16        17        18     
    
 y = 
    
    0.0960    0.2496    0.4032    0.5568    0.7104    0.8640   
    19        20        21        22        23        24    
    25        26        27        28        29        30         
    31        32        33        34        35        36   
    
fh = figure;
plot(x(2,:), y(2,:)); hold on;
plot(x(3,:), y(3,:)); hold on;
plot(x(4,:), y(4,:)); hold on;
datacursormode on
dcm = datacursormode(gcf); 
set(dcm,'UpdateFcn',@myupdatefcn)
function txt = myupdatefcn(trash,event)
pos = get(event,'Position');
dts = get(event.Target,'Tag');  
txt = {dts,...
       ['x: ',num2str(pos(1))],...
     ['y:',  num2str(pos(2))]};
I want to show x(1, ?) and y(1, ?) when the user clicks on a point in the curve.
Thank you all

Best Answer

....
set(dcm,'UpdateFcn',@(t,e) myupdatefcn(t,e,x,y) );
function txt = myupdatefcn(~,event,xdata,ydata)
    pos = get(event,'Position');
    dts = get(event.Target,'Tag'); 
    
    [~,j]= find( xdata==pos(1) & ydata==pos(2)  );
    txt = {dts,...
           ['x: ',num2str(pos(1)),'    x(1,?):  ', num2str(xdata(1,j))],...
           ['y: ',num2str(pos(2)),'    y(1,?):  ', num2str(ydata(1,j))]}; 
       
end
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