wehub-resource-sync
29 lines
653 B
Python
Executable File
29 lines
653 B
Python
Executable File
from prml.nn.tensor.constant import Constant
|
|
from prml.nn.tensor.tensor import Tensor
|
|
from prml.nn.function import Function
|
|
|
|
|
|
class Flatten(Function):
|
|
"""
|
|
flatten array
|
|
"""
|
|
|
|
def forward(self, x):
|
|
x = self._convert2tensor(x)
|
|
self._atleast_ndim(x, 2)
|
|
self.x = x
|
|
if isinstance(self.x, Constant):
|
|
return Constant(x.value.flatten())
|
|
return Tensor(x.value.flatten(), function=self)
|
|
|
|
def backward(self, delta):
|
|
dx = delta.reshape(*self.x.shape)
|
|
self.x.backward(dx)
|
|
|
|
|
|
def flatten(x):
|
|
"""
|
|
flatten N-dimensional array (N >= 2)
|
|
"""
|
|
return Flatten().forward(x)
|