我正在尝试重新实现本网站中的示例:他们有代码的地方:
class DKLModel(gpytorch.Module):
def __init__(self, feature_extractor, num_dim, grid_bounds=(-10., 10.)):
super(DKLModel, self).__init__()
self.feature_extractor = feature_extractor
self.gp_layer = GaussianProcessLayer(num_dim=num_dim, grid_bounds=grid_bounds)
self.grid_bounds = grid_bounds
self.num_dim = num_dim
def forward(self, x):
features = self.feature_extractor(x)
features = gpytorch.utils.grid.scale_to_bounds(features, self.grid_bounds[0], self.grid_bounds[1])
# This next line makes it so that we learn a GP for each feature
features = features.transpose(-1, -2).unsqueeze(-1)
res = self.gp_layer(features)
return res
model = DKLModel(feature_extractor, num_dim=num_features)
likelihood = gpytorch.likelihoods.SoftmaxLikelihood(num_features=model.num_dim, num_classes=num_classes)
if torch.cuda.is_available():
model = model.cuda()
likelihood = likelihood.cuda()
他们提到他们为每个特征学习一个 GP,但我希望所有特征都具有相同的高斯。任何人都知道该怎么做?