Hello,
I have an array of datetime objects.
What is the most efficient way of creating a new array
with only the hours or minutes out of it?
Here is an example:
### imports
import numpy as np
import datetime as dt
### create some data
d = dt.datetime.now()
dates_li = []
count = 0
for i in range(0, 24):
count = count +1
fact = count * 3600
date_new = d + dt.timedelta(0, fact)
print date_new
dates_li.append(date_new)
### the array with datetime objects
dates_array = np.array(dates_li)
### this is the loop I would like to optimize:
### looping over arrays is considered inefficient.
### what could be a better way?
hours_array = dates_array.copy()
for i in range(0, dates_array.size):
hours_array[i] = dates_array[i].hour
hours_array = hours_array.astype('int')
####
Thanks in advance for any hints!
Kind regards,
Timmie
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