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 vote182 views1 answer
Gaierror at /members/register [Errno 11001] getaddrinfo failed
Python
1 vote192 views1 answer
Nearest neaghbor matlab
Python
0 vote205 views2 answers
Django models get all
Python
0 vote195 views1 answer
Proj 4.9.0 must be installed.
Python
13 votes228 views6 answers
Tensorflow check gpu
Python
14 votes154 views6 answers
Ruby print
Python
12 votes233 views1 answer
Get program path directory
Python
0 vote255 views1 answer
Get most recent file in directory python
Python
9 votes156 views4 answers
Anagram
Python
0 vote187 views1 answer
Show which columns in dataframe have NA
Python