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Add ScaleKernel to get_covar_module_with_dim_scaled_prior #2619

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Add ScaleKernel to get_covar_module_with_dim_scaled_prior #2619

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10 changes: 7 additions & 3 deletions botorch/models/utils/gpytorch_modules.py
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Original file line number Diff line number Diff line change
Expand Up @@ -102,8 +102,8 @@ def get_covar_module_with_dim_scaled_prior(
batch_shape: torch.Size | None = None,
use_rbf_kernel: bool = True,
active_dims: Sequence[int] | None = None,
) -> MaternKernel | RBFKernel:
"""Returns an RBF or Matern kernel with priors
) -> ScaleKernel:
"""Returns an ScaleKernel based on RBF or Matern kernel with priors
from [Hvarfner2024vanilla]_.

Args:
Expand All @@ -130,4 +130,8 @@ def get_covar_module_with_dim_scaled_prior(
# pyre-ignore[6] GPyTorch type is unnecessarily restrictive.
active_dims=active_dims,
)
return base_kernel
return ScaleKernel(
base_kernel=base_kernel,
batch_shape=batch_shape,
outputscale_prior=GammaPrior(2.0, 0.15),
)
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