change the displayed value of x in a data tip to a different value at the same index in matlab

To change the displayed value of x in a data tip to a different value at the same index in MATLAB, you can use the DataTipTemplate property of the plot.

Here's an example that demonstrates how to accomplish this:

main.m
% Create a plot
x = 1:10;
y = x.^2;
plot(x, y)

% Get the handle to the current plot
h = gca;

% Create a custom data tip template
dtt = dataTipTextTemplate;
dtt.Callback = @(obj, event) updateDataTip(obj, event);

% Assign the custom data tip template to the plot
h.DataTipTemplate = dtt;

% Function to update the data tip display
function updateDataTip(obj, event)
    % Get the x value from the data tip
    xVal = event.Target.XData(event.Index);
    
    % Compute the new value
    newXVal = xVal + 10;
    
    % Update the data tip display
    event.Text = sprintf('x: %.2f\ny: %.2f', newXVal, event.Target.YData(event.Index));
end
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In this example, we create a custom data tip template using the dataTipTextTemplate function. We then assign a callback function updateDataTip to the template. Inside the callback function, we obtain the original x value from the data tip using event.Target.XData(event.Index). We can then compute the desired new value (newXVal). Finally, we update the event.Text property to display the new x value along with the existing y value.

This will change the displayed value of x in the data tip to the newly computed value at the same index.