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How to get values of X,Y,Z when i point courser on the graph

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Ruthvik sainath meka
Ruthvik sainath meka on 23 Jul 2019
Edited: Adam Danz on 25 Jul 2019
Here is the graph what i have
how to get the values of X,Y,Z when i point the courser on the graph?
i need a code which gives me information of all the paramets on the graph at that point
Ruthvik sainath meka
Ruthvik sainath meka on 23 Jul 2019
i tried using pcolor
and gave input for x,y,z values it says the z matrix dimension error

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Accepted Answer

Adam Danz
Adam Danz on 23 Jul 2019
Edited: Adam Danz on 23 Jul 2019
Method 1: use data tips
% Create demo scatter plot
x = linspace(0,3*pi,200);
y = cos(x) + rand(1,200);
sz = 25;
c = linspace(1,10,length(x));
s = scatter(x,y,sz,c,'filled');
% Add an additional row to the data tips showing the color value
datatipRow = dataTipTextRow('C',c);
s.DataTipTemplate.DataTipRows(end+1) = datatipRow;
% Now click on any point to produce the data tip (image below)
Method 2: return value to command window (or anywhere else you'd like)
This uses ginput() which allows the user to click on any space within the axes. It then computes the nearest point and returns its (x,y) coordinate and color value.
% User must select 1 point
[x,y] = ginput(1);
% Get (x,y) coordinates for all points
% *** This assumes the entire point was made with the one
% call to scatter() instead of several calls to scatter().
h = gco();
hx = h.XData;
hy = h.YData;
hc = h.CData;
% Find the nearest point to selection
d = sqrt((x-hx).^2 + (y-hy).^2);
[~,minIdx] = min(d);
% Return the (x,y) and color data
fprintf('(x,y,c) = (%.3f,%.3f,%.3f)\n',hx(minIdx),hy(minIdx),hc(minIdx));
Adam Danz
Adam Danz on 23 Jul 2019
"can there be any modification..."
Yes. One way to do it is by increasing the number in ginput(). For exampe, ginput(10) requires that the user select 10 points before anything happens. The [x,y] output will be vectors of 10. You'll also need to modify the fprintf() command unless you've implemented a different, more useful output.
Another way is to put method #2 in a loop. Let me know if you get stuck.

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