Elfun18 - A collection of MATLAB functions for the computation of elliptic integrals and Jacobian elliptic functions of real arguments. We outline a set of MATLAB functions that enable the computation of elliptic integrals and Jacobian elliptic functions for real arguments. The correctness, robustness, efficiency, and accuracy of the functions are discussed in detail. An example from elasticity theory is provided to illustrate the use of this collection.