I want to delete all the elements from a Numpy array except the last element and return the Numpy array. For eg: arr = np.array([4, 5, 6, 7, 8, 9, 10, 11]) Output should be:: arr = [11]
Please let me know how can I achieve this.
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Maybe you can try arr[-1:]Kays Kadhi– Kays Kadhi2022-04-19 08:33:18 +00:00Commented Apr 19, 2022 at 8:33
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2 Answers
We can slice using -1 to start from the last item.
import numpy as np
arr = np.array([4, 5, 6, 7, 8, 9, 10, 11])
last_arr = arr[-1:]
print (last_arr)
gives
[11]
We can use arr[-1] to get the value of the last element, but it gives us the value 11 and not as an array [11] as you want. We can then create a new array, but this is a longer way to do it.
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FLAK-ZOSO
For sure getting the last part of the array is a better idea than creating a new one, so you deserve my upvote. +1
You can simply write:
arr[-1] # This is the last element
so you can assign something this way:
arr = np.array([arr[-1]]) # A numpy.array containing only the last element of the other one
Otherwise, if you only want a list containing the last element:
new = [arr[-1]]
