def log_geometric_mean(series: Series) -> float:
"""Returns the Logarithmic Geometric Mean"""
n = series.size
if n < 2: return 0
else:
series = series.fillna(0) + 1
if npAll(series > 0):
return npExp(npLog(series).sum() / n) - 1
return 0
def geometric_mean(series: Series) -> float:
"""Returns the Geometric Mean for a Series of positive values."""
n = series.size
if n < 1:
return series.iloc[0]
has_zeros = 0 in series.values
if has_zeros:
series = series.fillna(0) + 1
if npAll(series > 0):
mean = series.prod()**(1 / n)
return mean if not has_zeros else mean - 1
return 0