MATLAB Answers

How to define a custom layer in deep learning toolbox which makes multiple copies of a matrix ?

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Shraddha Jain
Shraddha Jain on 18 Aug 2019
Answered: Hon Wah Yeung on 6 Nov 2019
I have to design a deep fully connected neural network for regression task. I am using examples from the deep learning toolbox for images. My input matrix size and precticted matrix Y has the same size of [1 1 32]. But my target matrix T has size [168 1 32]. Since the regressionLayer requires the predicted Y and target T matrices to be of same size, for the purpose of my loss function I need to replicate the predicted matrix Y 168 times.
So, I want to know how to add a Layer while designing neural network which just does repmat() before I pass it to the last regressionLayer.
Thank you.

Answers (1)

Hon Wah Yeung
Hon Wah Yeung on 6 Nov 2019
I kind of have this problem a while ago but now fixed it. It can be done by the following, just one line.
suppose the [1 1 32] is your X1, and you want N row copies of this
Ones = ones([N 1],'like',X1);
and the 2019b version will automatically do the backward function for you.


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