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.
CodePudding user response:
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.
CodePudding user response:
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]]