Source code for gluonts.torch.modules.lookup_table

# Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License").
# You may not use this file except in compliance with the License.
# A copy of the License is located at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# or in the "license" file accompanying this file. This file is distributed
# on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
# express or implied. See the License for the specific language governing
# permissions and limitations under the License.

import torch
import torch.nn as nn

from gluonts.core.component import validated


[docs]class LookupValues(nn.Module): """ A lookup table mapping bin indices to values. Parameters ---------- bin_values Tensor of bin values with shape (num_bins, ). """ @validated() def __init__(self, bin_values: torch.Tensor): super().__init__() self.register_buffer("bin_values", bin_values)
[docs] def forward(self, indices: torch.Tensor) -> torch.Tensor: assert isinstance(self.bin_values, torch.Tensor) indices = torch.clamp(indices, 0, self.bin_values.shape[0] - 1) return torch.index_select( self.bin_values, 0, indices.reshape(-1) ).view_as(indices)