Corrected #ifdef for Eigen compatibility

include/Array.h

@@ -693,6 +693,8 @@ template <typename T> class Array {
      * Its self assigning version is transpose. This is restricted to numerical types.
      * \brief Host only
      */
+
+#ifdef CUDATOOLS_USE_EIGEN
     Array transposed() const {
         static_assert(is_host_num<T>, "Function only available on host-compatible numeric types.");
         CT_ERROR_IF(shape().axes(), !=, 2, "Tranpose can only occur on two-dimensional arrays");
@@ -722,6 +724,7 @@ template <typename T> class Array {
         Array<T> inv(shape());
         inv.eigenMap() = this->eigenMap().inverse();
     };
+#endif
 
     /**
      * Pins the memory (page locks) for faster memory transfer in concurrent