numpy.percentile() in python
numpy.percentile()function used to compute the nth percentile of the given data (array elements) along the specified axis.
Syntax : numpy.percentile(arr, n, axis=None, out=None)
Parameters :
arr :input array.
n : percentile value.
axis : axis along which we want to calculate the percentile value. Otherwise, it will consider arr to be flattened(works on all the axis). axis = 0 means along the column and axis = 1 means working along the row.
out :Different array in which we want to place the result. The array must have same dimensions as expected output.
Return :nth Percentile of the array (a scalar value if axis is none)or array with percentile values along specified axis.
Code #1 : Working
- Python
# Python Program illustrating# numpy.percentile() method import numpy as np # 1D arrayarr = [20, 2, 7, 1, 34]print("arr : ", arr)print("50th percentile of arr : ", np.percentile(arr, 50))print("25th percentile of arr : ", np.percentile(arr, 25))print("75th percentile of arr : ", np.percentile(arr, 75)) |
Output :
arr : [20, 2, 7, 1, 34] 50th percentile of arr : 7.0 25th percentile of arr : 2.0 75th percentile of arr : 20.0
Code #2 :
- Python
# Python Program illustrating# numpy.percentile() method import numpy as np# 2D arrayarr = [[14, 17, 12, 33, 44], [15, 6, 27, 8, 19], [23, 2, 54, 1, 4,]]print("\narr : \n", arr) # Percentile of the flattened arrayprint("\n50th Percentile of arr, axis = None : ", np.percentile(arr, 50))print("0th Percentile of arr, axis = None : ", np.percentile(arr, 0)) # Percentile along the axis = 0print("\n50th Percentile of arr, axis = 0 : ", np.percentile(arr, 50, axis =0))print("0th Percentile of arr, axis = 0 : ", np.percentile(arr, 0, axis =0)) |
Output :
arr : [[14, 17, 12, 33, 44], [15, 6, 27, 8, 19], [23, 2, 54, 1, 4]] 50th Percentile of arr, axis = None : 15.0 0th Percentile of arr, axis = None : 1.0 50th Percentile of arr, axis = 0 : [15. 6. 27. 8. 19.] 0th Percentile of arr, axis = 0 : [14. 2. 12. 1. 4.] 50th Percentile of arr, axis = 1 : [17. 15. 4.] 0th Percentile of arr, axis = 1 : [12. 6. 1.]
Code #3 :
- Python
# Python Program illustrating# numpy.percentile() methodimport numpy as np# 2D arrayarr = [[14, 17, 12, 33, 44], [15, 6, 27, 8, 19], [23, 2, 54, 1, 4,]]print("\narr : \n", arr)# Percentile along the axis = 1print("\n50th Percentile of arr, axis = 1 : ", np.percentile(arr, 50, axis =1))print("0th Percentile of arr, axis = 1 : ", np.percentile(arr, 0, axis =1)) print("\n0th Percentile of arr, axis = 1 : \n", np.percentile(arr, 50, axis =1, keepdims=True))print("\n0th Percentile of arr, axis = 1 : \n", np.percentile(arr, 0, axis =1, keepdims=True)) |
Output :
arr : [[14, 17, 12, 33, 44], [15, 6, 27, 8, 19], [23, 2, 54, 1, 4]] 0th Percentile of arr, axis = 1 : [[17.] [15.] [ 4.]] 0th Percentile of arr, axis = 1 : [[12.] [ 6.] [ 1.]]
Last Updated on November 13, 2021 by admin