F-transform and Fuzzy Natural logic in Time Series Analysis

V. Novák,Viktor Pavliska,I. Perfilieva,M. Štěpnička

Published 2013 in EUSFLAT Conf.

ABSTRACT

This paper continues the development of the innovative method for time series analysis and forecasting using special soft-computing techniques: fuzzy (F-) transform and Fuzzy Natural Logic. We will demonstrate that the F-transform is a proper technique for extraction of the trend-cycle of time series. Furthermore, we will elaborate in more detail automatic generation of linguistic evaluation of its behavior in arbitrary time slots. Thanks to the firstdegree F-transform (F1-transform), this works even if the graph of the time series visually does not suggest a clear tendency.

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