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userland/libs/eigen/hello.cpp

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+/* https://github.com/cirosantilli/linux-kernel-module-cheat#eigen
+ * Adapted from: https://eigen.tuxfamily.org/dox/GettingStarted.html
+ */
+
+#include <iostream>
+
+#include <Eigen/Dense>
+
+int main() {
+    Eigen::MatrixXd m(2,2);
+    m(0,0) = 3;
+    m(1,0) = 2.5;
+    m(0,1) = -1;
+    m(1,1) = m(1,0) + m(0,1);
+    std::cout << m << std::endl;
+}