Multiple plots in Matlab app designer, with changing values.

I want to draw a vertical line over a function, but when I change the vertical line's position using a slider it draws several other lines instead of moving it.

How can I draw multiple plots in app designer that can be changed without it keeping the previous version of the plot ?

Answer 1

[Adam Danz]

In the slider callback function, instead of using the same command to plot a new vertical line, update the x value of the vertical line.

persistent verticalLineHandle   % or declare the handle as an app property
if isempty(verticalLineHandle)
    verticalLineHandle = xline(app.uiaxes, x);  % x = slider value, I suppose
else
    verticalLineHandle.Value = x;    % x = slider value, I suppose
end