When training a network on the CPU and using the Evaluator class to output the MAE or MSE, the reported values are scalars. However, when running the same code on the GPU, the reported values become arrays (and the whole output cannot be serialized into a JSON file). There seems to be a bug in Chainer's reporter class, since the conversion to a scalar is not automatically done, in this case. I will report this to the Chainer team, but this PR should be a temporary fix until the issue is settled.
When training a network on the CPU and using the
Evaluatorclass to output theMAEorMSE, the reported values are scalars. However, when running the same code on the GPU, the reported values become arrays (and the whole output cannot be serialized into aJSONfile). There seems to be a bug in Chainer's reporter class, since the conversion to a scalar is not automatically done, in this case. I will report this to the Chainer team, but this PR should be a temporary fix until the issue is settled.