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A Qualitative Method of Trend Curve Analysis

Author

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  • A Okabe

    (Department of Urban Engineering, University of TÅ kyÅ , 7-3-1 HongÅ , BunkyÅ , TÅ kyÅ 113, Japan)

Abstract

This paper gives a method for analyzing qualitative characteristics of a trend curve. First, a small segment of the trend curve is examined in terms of a ‘peak’, a ‘bottom’, and a ‘slope’. Second, a sequence of these qualitative local trends is topologically investigated. Third, to measure the qualitative similarity between two trend curves a qualitative similarity coefficient is proposed. Last, an empirical application is given.

Suggested Citation

  • A Okabe, 1982. "A Qualitative Method of Trend Curve Analysis," Environment and Planning A, , vol. 14(5), pages 623-627, May.
    • Handle: RePEc:sae:envira:v:14:y:1982:i:5:p:623-627
    DOI: 10.1068/a140623
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