Abstract: A system, a computer program produce, and an associated method for the interactive mining of time series or sequence data detect data subsequences in one or more numerical data series, that are identical or similar to a given search pattern. In order to achieve more flexibility of data analysis the system provides a graphical user interface for interactively incorporating subsidiary search patterns into a current definition of similarity. The subsidiary search patterns may be part of the data series under analysis or may be defined by the user. Thus, an iterative procedure for data mining is established for progressively improving the search result that explicitly comprises the features defined by the user.