Squashed 'third_party/eigen/' content from commit 61d72f6
Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/unsupported/doc/examples/MatrixFunction.cpp b/unsupported/doc/examples/MatrixFunction.cpp
new file mode 100644
index 0000000..a4172e4
--- /dev/null
+++ b/unsupported/doc/examples/MatrixFunction.cpp
@@ -0,0 +1,23 @@
+#include <unsupported/Eigen/MatrixFunctions>
+#include <iostream>
+
+using namespace Eigen;
+
+std::complex<double> expfn(std::complex<double> x, int)
+{
+ return std::exp(x);
+}
+
+int main()
+{
+ const double pi = std::acos(-1.0);
+
+ MatrixXd A(3,3);
+ A << 0, -pi/4, 0,
+ pi/4, 0, 0,
+ 0, 0, 0;
+
+ std::cout << "The matrix A is:\n" << A << "\n\n";
+ std::cout << "The matrix exponential of A is:\n"
+ << A.matrixFunction(expfn) << "\n\n";
+}