utils.h

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#pragma once
 
#ifndef UTILS_H
#define UTILS_H
 
#include <armadillo>
 
using Real = double;
using namespace arma;
 
class Utils
{
public:
    static sp_mat spkron(const sp_mat &A, const sp_mat &B);
    static sp_mat spjoin_rows(const sp_mat &A, const sp_mat &B);
    static sp_mat spjoin_cols(const sp_mat &A, const sp_mat &B);
    static vec spsolve_eigen(const sp_mat &A, const vec &b);
    // MATLAB-like MeshGrid
    void meshgrid(const vec &x, const vec &y, mat &X, mat &Y);
    void meshgrid(const vec &x, const vec &y, const vec &z, cube &X, cube &Y, cube &Z);
};
 
#endif // UTILS_H