PythonQ 240-8XX Manuale Utente Scaricare il pdf (Pagina 13)

! www.simula.no/˜hpl

Changing array dimensions

>>> a = array([0, 1.2, 4, -9.1, 5, 8])

>>> a.shape = (2,3) # turn a into a 2x3 matrix

>>> print a

[[ 0. 1.2 4. ]

[-9.1 5. 8. ]]

>>> a.size

>>> a.shape = (a.size,) # turn a into a vector of length 6 again

>>> a.shape

(6,)

>>> print a

[0. 1.2 4. -9.1 5. 8.]

>>> a = a.reshape(2,3) # same effect as setting a.shape

>>> a.shape

(2, 3)

Numerical Python – p. 247/728

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 36 37

Nessun commento

PythonQ 240-8XX Manuale Utente Pagina 13