# skfolio.measures.ulcer_index ### skfolio.measures.ulcer_index(drawdowns) Compute the Ulcer index. * **Parameters:** **drawdowns** *ndarray of shape (n_observations,) or (n_observations, n_assets)* : Vector of drawdowns. * **Returns:** **value** *float or ndarray of shape (n_assets,)* : Ulcer Index. If `returns` is a 1D-array, the result is a float. If `returns` is a 2D-array, the result is a ndarray of shape (n_assets,).