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 vote370 views1 answer
Python write requests response to text file
Python
0 vote365 views1 answer
Confusion matrix seaborn
Python
6 votes372 views1 answer
Np euclidean distance python
Python
1 vote352 views2 answers
Python multiline comment
Python
0 vote350 views1 answer
Are logN and (lognN) same
Python
1 vote333 views1 answer
Python requests.get pdf An appropriate representation of the requested resource could not be found
Python
4 votes335 views2 answers
Extract text from pdf python
Python
-4 votes337 views2 answers
The Dreamers
Python
0 vote399 views1 answer
Django queryset group by sum
Python Django
0 vote357 views1 answer
Reason: Worker failed to boot
Python