Random choice sampling numpy

Python select random subset from numpy array

fruits = ['apple', 'banana', 'orange', 'grape']
subset_size = int(0.7 * len(fruits))
np.random.choice(fruits, subset_size, replace=False)
# array(['grape', 'banana'], dtype='<U6')

Source: docs.scipy.org

Random choice sampling numpy

>>> np.random.choice(5, 3, replace=False)
array([3,1,0])
>>> #This is equivalent to np.random.permutation(np.arange(5))[:3]

Source: docs.scipy.org

Numpy random for string

>>> aa_milne_arr = ['pooh', 'rabbit', 'piglet', 'Christopher']>>> np.random.choice(aa_milne_arr, 5, p=[0.5, 0.1, 0.1, 0.3])array(['pooh', 'pooh', 'pooh', 'Christopher', 'piglet'],   dtype='|S11')fruits = ['apple', 'banana', 'orange', 'grape']
subset_size = int(0.7 * len(fruits))
np.random.choice(fruits, subset_size, replace=False)
# array(['grape', 'banana'], dtype='<U6')

Source: docs.scipy.org

Similar codes

0 vote237 views1 answer
Django form field add attrs
Python
-2 votes266 views1 answer
Dlib python install error
Python
1 vote243 views1 answer
How to check for duplicates in a column in python
Python
7 votes220 views1 answer
Create text channel discord.py
Python
5 votes250 views5 answers
Closure
Python
2 votes232 views1 answer
Python list shift left
Python
0 vote223 views1 answer
Sort list in python by substring
Python
1 vote215 views1 answer
Apply a created function pandas
Python
3 votes219 views5 answers
Calc
Python
0 vote265 views1 answer
Disable csrf token django
Python Django