Hi,
I understand that MATLAB Online is showing your plot upside down and you want it to be in the correct orientation.
One way to resolve this is setting the figure’s “Renderer” property to “painters”. Example of this as follows
figure;
set(gcf, 'renderer', 'painters');
However, if that does not work, you can try changing the display of the axes object. Example of this could be
axes;
set(gca, 'YTickLabelRotation', angle);
set(gca, 'XTickLabelRotation', angle);
set(gca, 'XAxisLocation', 'bottom');
You can also explore properties like “Ydir” and “Xdir” of the axes object if the values on the axis are reversed.