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Diffstat (limited to 'doc/examples/class_VectorBlock.cpp')
-rw-r--r-- | doc/examples/class_VectorBlock.cpp | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/doc/examples/class_VectorBlock.cpp b/doc/examples/class_VectorBlock.cpp new file mode 100644 index 000000000..d979f973a --- /dev/null +++ b/doc/examples/class_VectorBlock.cpp @@ -0,0 +1,26 @@ +#include <Eigen/Core> +USING_PART_OF_NAMESPACE_EIGEN +using namespace std; + +template<typename Derived> +Eigen::VectorBlock<Derived> +segmentFromRange(MatrixBase<Derived>& v, int start, int end) +{ + return Eigen::VectorBlock<Derived>(v.derived(), start, end-start); +} + +template<typename Derived> +const Eigen::VectorBlock<Derived> +segmentFromRange(const MatrixBase<Derived>& v, int start, int end) +{ + return Eigen::VectorBlock<Derived>(v.derived(), start, end-start); +} + +int main(int, char**) +{ + Matrix<int,1,6> v; v << 1,2,3,4,5,6; + cout << segmentFromRange(2*v, 2, 4) << endl; // calls the const version + segmentFromRange(v, 1, 3) *= 5; // calls the non-const version + cout << "Now the vector v is:" << endl << v << endl; + return 0; +} |