8 lines
201 B
Python
8 lines
201 B
Python
|
import numpy as np
|
||
|
from pyFTS import *
|
||
|
|
||
|
def differential(original):
|
||
|
n = len(original)
|
||
|
diff = [ original[t-1]-original[t] for t in np.arange(1,n) ]
|
||
|
diff.insert(0,0)
|
||
|
return np.array(diff)
|