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eigen/doc/examples/Tutorial_ReductionsVisitorsBroadcasting_maxnorm.cpp
2026-05-04 00:36:12 +00:00

20 lines
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C++

// SPDX-FileCopyrightText: The Eigen Authors
// SPDX-License-Identifier: MPL-2.0
#include <iostream>
#include <Eigen/Dense>
int main() {
Eigen::MatrixXf mat(2, 4);
mat << 1, 2, 6, 9, 3, 1, 7, 2;
Eigen::Index maxIndex;
float maxNorm = mat.colwise().sum().maxCoeff(&maxIndex);
std::cout << "Maximum sum at position " << maxIndex << std::endl;
std::cout << "The corresponding vector is: " << std::endl;
std::cout << mat.col(maxIndex) << std::endl;
std::cout << "And its sum is is: " << maxNorm << std::endl;
}