diff options
Diffstat (limited to 'numpy/lib/function_base.py')
| -rw-r--r-- | numpy/lib/function_base.py | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/numpy/lib/function_base.py b/numpy/lib/function_base.py index 86125168a..3c9983edf 100644 --- a/numpy/lib/function_base.py +++ b/numpy/lib/function_base.py @@ -67,7 +67,7 @@ __all__ = [ # fix_gamma : Callable # A function used for discret methods to force the index to a specific value. _QuantileInterpolation = dict( - # --- HYNDMAN and FAN methods + # --- HYNDMAN AND FAN METHODS # Discrete methods inverted_cdf=dict( get_virtual_index=lambda n, quantiles: _inverted_cdf(n, quantiles), @@ -102,10 +102,12 @@ _QuantileInterpolation = dict( _compute_virtual_index(n, quantiles, 0, 0), fix_gamma=lambda gamma, _: gamma, ), - # Default value + # Default method. + # To avoid some rounding issues, `(n-1) * quantiles` is preferred to + # `_compute_virtual_index(n, quantiles, 1, 1)`. + # They are mathematically equivalent. linear=dict( - get_virtual_index=lambda n, quantiles: - _compute_virtual_index(n, quantiles, 1, 1), + get_virtual_index=lambda n, quantiles: (n - 1) * quantiles, fix_gamma=lambda gamma, _: gamma, ), median_unbiased=dict( @@ -118,7 +120,7 @@ _QuantileInterpolation = dict( _compute_virtual_index(n, quantiles, 3 / 8.0, 3 / 8.0), fix_gamma=lambda gamma, _: gamma, ), - # --- OTHER METHODS fixme add deprecated ? + # --- OTHER METHODS lower=dict( get_virtual_index=lambda n, quantiles: np.floor( (n - 1) * quantiles).astype(np.intp), |