Boundaries of membrane in P systems relying on multiset approximation spaces in language R

Membrane computing is an area within computer science which aims to develop a new computational model through the study of the characteristics of biological cells. It is a distributed and parallel computing model. Communication between regions through membranes, as well as membrane system and its environment, plays an important role in the process. Combination of P system with multiset approximation space leads to the abstract concept of 'to be close enough to a membrane'. The designated goal is to perform calculations in this two-fold system by the help of language R. Some packages can perform calculations with multisets in R (such as 'sets' package), but they are more closely linked to fuzzy systems. In this paper a new program library in language R is initiated which had been created to encourage some fundamental calculations in membrane systems combined with multiset approximation spaces. Data structures and functions are illustrated by examples.