用特征库再现张量矩阵

Question

I'm facing a little problem. I'm translating a program from matlab/octave to C++. This progam is dealing with some matrix manipulation. I want to reproduce this : in matlab/octave we can define a matrix like :

      matrix = zeros(10,25,360);

and I get a matrix with 10 rows, 25 columns and a "depth" of 360. I want to reproduce the same thing in C++ using Eigen.

Thank you in advance for your help.

Answer 1

There are unsupported Modules for Eigen which let you define tensors . With those modules you can translate your problem into C++.

Answer 2

The current Eigen tensor module is extremely limited feature wise. You can't even add the coefficients of 2 tensors together! I have been using the tensor code in this fork of Eigen instead. It adds support for coefficient wise operations, convolutions, contractions, and recently morphing primitives such as slicing. Moreover it can take advantage of GPUs to speed things up which was the big selling point for me.

There is a pending pull request so hopefully it will make its way into the main Eigen code base soon.