How to get the maximum value of an Eigen tensor?-CodePudding

I am trying to find the maximum value of an Eigen tensor. I know how to do this using Eigen matrices but obviously this is not working for a tensor:

Example

static const int nx = 4;  
static const int ny = 4; 
static const int nz = 4;

Eigen::Tensor<double, 3> Test(nx,ny,nz); 
Test.setZero();

Eigen::Tensor<double, 3> MaxTest(nx,ny,nz); 
MaxTest.setZero();  
MaxTest = Test.maxCoeff();

Usually for an Eigen matrix I would do the following:

MaxTest = Test.array().maxCoeff();

But this is not working, instead I get the error:

class "Eigen::Tensor<std::complex<double>, 3, 0, Eigen::DenseIndex>" has no member "maxCoeff"

Is there another way to get the maximum value of this tensor? Something equivalent to max(max(max(tensor))) in MATLAB.

CodePudding user response：

You can use maximum(), see the documentation:

static const int nx = 4;  
static const int ny = 4; 
static const int nz = 4;

Eigen::Tensor<double, 3> MaxTest(nx,ny,nz); 
MaxTest.setZero();  
Eigen::Tensor<double, 0> MaxAsTensor = MaxTest.maximum();
double Max = MaxAsTensor(0);
std::cout << "Maximum = " << max_dbl << std::endl;