Problem to use the Eigen header
Hi every body
I am new in C++, and I am trying to use Eigen with very simple code. I firstly tried with the code
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#include <iostream>
#include <Eigen/Dense>
using namespace std;
using namespace Eigen;
VectorXf CreateZe(const Ref<const VectorXf> Ne)
{
VectorXf zeta=1/Ne[0]*Ne;
VectorXf zetaInverse(Ne.rows());
for(int i(0);i<(Ne.rows());i++){zetaInverse[i]=(1/zeta[i]);}
return zetaInverse;
}
int main()
{
Matrix2f M;
M << -5e-4,5e-4,1e-4,-1e-4;
Vector2f n_e;
n_e << 4,5;
Vector2f Ne;
Ne<<2000,1000;
Vector2f zetaInverse=CreateZe(Ne);
cout << "zetaInverse \n";
cout<< zetaInverse << endl;
}
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but when I tried to add a second parameter for a very simple operation I got an error :
reateZeFunction.cpp:34:32: error: ‘ne’ was not declared in this scope
Vector2f BeVect=CreateZe(Ne,ne);
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#include <iostream>
#include <Eigen/Dense>
using namespace std;
using namespace Eigen;
VectorXf CreateZe(const Ref<const VectorXf> Ne,const Ref<const VectorXf> ne)
{
VectorXf zeta=1/Ne[0]*Ne;
VectorXf zetaInverse(Ne.rows());
VectorXf BeVect(Ne.rows());
for(int i(0);i<(Ne.rows());i++){zetaInverse[i]=(1/zeta[i]);}
for (int i(0);i<(Ne.rows());i++){
BeVect[i]=zetaInverse[i]*n_e[i];
}
return BeVect;
}
int main()
{
Matrix2f M;
M << -5e-4,5e-4,1e-4,-1e-4;
Vector2f n_e;
n_e << 4,5;
Vector2f Ne;
Ne<<2000,1000;
Vector2f BeVect=CreateZe(Ne,ne);
cout << "BeVect \n";
cout<< BeVect << endl;
}
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Thank for your help in advance
You haven't created a variable named 'ne' in main().
Vector2f BeVect=CreateZe(Ne,ne);
What's ne? There is no such variable. You never made an object named ne
Thank you I see. I put n_e instead of ne.
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