How to set the min and max value for SpanSelector widget programmatically
Solution 1:
Set the selection rectangle stay_rect and call the onselect handler with the initial xmin and xmax values.
Example: initial view of the example from the docs with the following inserted before plt.show():
xmin, xmax = 3, 4
span.stay_rect.set_bounds(xmin, 0, xmax-xmin, 1)
span.stay_rect.set_visible(True)
span.onselect(xmin, xmax)
