A numpy arrauy of domain values indicating where step changes occur in the step function.
numpy.ndarray
See also
Stairs.step_values
Stairs.step_changes
Stairs.number_of_steps
Examples
>>> s1.plot() >>> s1.step_values array([1, 2, 3, 4, 5], dtype=int64)
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staircase.Stairs.step_values
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staircase.Stairs.to_frame