/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

0 vote141 views1 answer
Decorator patter
Python
0 vote59 views1 answer
Create bbox R sp
Python
0 vote102 views1 answer
Python round and map function
Python
0 vote144 views1 answer
Python get number of days
Python
0 vote94 views1 answer
How to create tensor with tensorflow
Python
0 vote106 views2 answers
Torch tensor to pandas dataframe
Python
0 vote109 views1 answer
How to set propee timeline in python
Python
0 vote124 views1 answer
Python force realod
Python
0 vote110 views1 answer
Python cursor placement
Python
0 vote104 views1 answer
Python pad with spaces
Python