尝试写一个numpy的切片(python)

Question

return an array containing the elements of v but without the first and last elements, and the remaining elements in reverse order.

The code should print

[3 1 2 4]

 

import numpy as np

v = np.array([9, 4, 2, 1, 3, 8])

new_v = v[1:-1][::-1]

print(new_v)

 

new_v 括号的右边要小于12 characters的长度

 

 

 

Answer 1

import numpy as np

arr = np.arange(12)
print 'array is:', arr

slice_one = arr[:4]
print 'slice begins at 0 and ends at 4 is:', slice_one

slice_two = arr[7:10]
print 'slice begins at 7 and ends at 10 is:', slice_two

slice_three = arr[0:12:4]
print 'slice begins at 0 and ends at 12 with step 4 is:', slice_three