sciPy stats.tmean() | Python

scipy.stats.tmean(array, limits=None, inclusive=(True, True)) calculates the trimmed mean of the array elements along the specified axis of the array.

It’s formula –

Parameters :
array: Input array or object having the elements to calculate the trimmed mean.
axis: Axis along which the trimmed mean is to be computed. By default axis = 0.
limits: Lower and upper bound of the array to consider, values less than the lower limit or greater than the upper limit will be ignored. If limits is None [default], then all values are used.

Returns : Trimmed mean of the array elements based on the set parameters.

Code #1:

# Trimmed Mean

from scipy import stats
import numpy as np

# array elements ranging from 0 to 19
x = np.arange(20)

print("Trimmed Mean :", stats.tmean(x))


print("\nTrimmed Mean by setting limit : ",
      stats.tmean(x, (2, 10)))

Output:

Trimmed Mean : 9.5

Trimmed Mean by setting limit :  6.0

Code #2: With multi-dimensional data, axis() working

# Trimmed Mean

from scipy import stats
import numpy as np

arr1 = [[1, 3, 27],
        [5, 3, 18],
        [17, 16, 333],
        [3, 6, 82]]


# using axis = 0
print("\nTrimmed Mean is with default axis = 0 : \n",
      stats.tmean(arr1, axis = 1))

Output:

Trimmed Mean is with default axis = 0 : 
 42.8333333333