/Python/Python multiply one column of array by a value

Python multiply one column of array by a value

import numpy as np
# Let a be some 2d array; here we just use dummy data 
# to illustrate the method
a = np.ones((10,5))
# Multiply just the 2nd column by 5.2 in-place
a[:,1] *= 5.2

# Now get the cumulative sum of just that column
csum = np.cumsum(a[:,1])

Source: stackoverflow.com

Similar codes

1 vote200 views1 answer
Add year to id django
Python
0 vote203 views1 answer
Python how to make integer show 2 numbers
Python
0 vote187 views1 answer
Python calculator file size to megabytes
Python
0 vote179 views1 answer
Python format inverse
Python
0 vote210 views1 answer
Multiple arguments with multiprocessing python
Python
25 votes189 views3 answers
Python warnings as error
Python
0 vote196 views2 answers
Comment faire un long commentaire en python
Python
0 vote221 views1 answer
Mechanize python #2
Python
1 vote188 views1 answer
Exclude first value of an array python
Python
1 vote190 views1 answer
How to locate image using pyautogui
Python