Abstract
Fuzzy logic that facilitates linking the ambiguous situations (fuzzy) is similar to patterns of descriptive categories of thinking through the linkage of cases under certain conditions. Fuzzy logic is attractive subject in search of the address information that there are ambiguous style precisions. The goal of the search function to propose a membership of a sample of medical plants and using the language of MATHLAB after the data were a cluster of plants with similar characteristics depending on the percentage of volatile oil and fixed by a cluster observations using software package MINITAB. In theoretical part, the research included a definition of the fuzzy logic and its technique, phases of logic, differences between crisp sets and fuzzy sets, probability theory and fuzzy logic theory. .
