Improvements to calculate_efh()
- takeoff_angle should be in radians not degrees (all classes work on radians for consistency)
- uses a different approach to the nan slope[0] value so that we don't have to drop a value
- ensures an exact 0.2 interval as the docstring states
- clarified some items in the documentation string
- updated test to work with radians
@bryncloud I've made some changes to calculate_efh()
, main one you may need to worry about is that it now accepts radians instead of degrees for consistency.