custom loss function for DNN training

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Pratheek
Pratheek 2019-5-16
回答： Dinial Utami Nurul Qomariah 2020-1-27
how can i write a custom loss fucntion for DNN training. I want to try reconstruction loss

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回答（2 个）

Shounak Mitra
Shounak Mitra 2019-5-17
You can create custom layers and define custom loss functions for output layers.
The output layer uses two functions to compute the loss and the derivatives: forwardLoss and backwardLoss. The forwardLoss function computes the loss L. The backwardLoss function computes the derivatives of the loss with respect to the predictions.
Refer https://www.mathworks.com/help/deeplearning/ug/define-custom-deep-learning-layers.html
For eg., to write a weighted cross entropy classification loss, try running this in the MATLAB command window
>> edit(fullfile(matlabroot,'examples','deeplearning_shared','main','weightedClassificationLayer.m'))
Hope this helps
Dinial Utami Nurul Qomariah

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