# Copyright (c) 2021. Lucas G. S. Jeub
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
[docs]
def VGAE_loss(model, data):
"""
loss function for use with :func:`VGAE_model`
Args:
model:
data:
Returns:
loss value
"""
return model.recon_loss(model.encode(data), data.edge_index) + model.kl_loss() / data.num_nodes
[docs]
def GAE_loss(model, data):
"""
loss function for use with :func:`GAE_model`
Args:
model:
data:
Returns:
reconstruction loss
"""
return model.recon_loss(model.encode(data), data.edge_index)