Neural Network for multidimensional problem

Question

Hi there,

I'm wondering if it's possible for Neural Network to operate on matrices say I want to:

A(i)=matrix(10,10) -> B(i)=matrix(10,10) 
input = vector of matrices, i = sample size
output = vector of matrices

Say I would like to guess an matrix operation transforming matrix into another matrix ie

 f(A(i,j))=2*A(i,j)*b

Matlab does not take arrays with dimension >2 in NNtool

Any idea?

Thanks

Answer 1

You can simply convert the arrays into vectors before passing them to NNtool. It won't make a difference for the result of your calculation.

In other words, instead of passing A(:,:,i) to NNtool, you pass reshape(A(:,:,i),[],1). Then you reshape the output into a 10x10 array by using B = reshape(outputOfNNtool,10,10).