Python NumPy Module Cheatsheet
Aus MattWiki
NumPy Module
```python import numpy as np ```
NumPy Array
```python my_list = [92, 94, 88, 91, 87] numpy_array_from_list = np.array(my_list) ``
NumPy Array from CSV File
```python csv_file_name = 'test_2.csv' numpy_array_from_csv_file = np.genfromtxt(csv_file_name, delimiter=',') ``
Operations on NumPy Arrays
numpy_array = np.array([1, 2, 3, 4, 5])
print(numpy_array + 1)
returns [2, 3, 4, 5, 6]
print(numpy_array ** 2)
returns [1, 2, 9, 16, 25]
Variance
import numpy as np
dividends_microsoft_eur = [0.6358, 0.6308, 0.6364, 0.6854, 0.6876, 0.7016, 0.7016, 0.7906]
variance_dividends_microsoft = np.var(dividends_microsoft_eur)
print('The variance of Microsoft stock dividends in 2023 and 2024 is', variance_dividends_microsoft)
