When you set the axes YLim
set(axes_objects(i).Children(end).Parent,'YLim',minmax_detr)
the cursor lines don't update automatically so they're now off-scale. Just set their YData to the same YLim:
set(axes_objects(i).Children([5 6]),'YData',minmax_detr)
and update the cursor texts Position as well:
text_y_val = mean(minmax_detr); % pick some y-location(s) you like
for idx = [7 8]
text_pos = axes_objects(i).Children(idx).Position;
text_pos(2) = text_y_val;
axes_objects(i).Children(idx).Position = text_pos;
end
Of course, this is assuming that axes_objects(i).Children is as it is shown in your screen shot, so that elements 5, 6, 7, 8 are always the cursor lines and texts. That may be a bad assumption if you add or remove anything from the axes later on, so you really should store handles to graphics objects as variables in their own right and not assume some particular child ordering.
