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Apparatus and method for automatically creating membership functions

  • US 5,402,525 A
  • Filed: 08/06/1993
  • Issued: 03/28/1995
  • Est. Priority Date: 08/26/1992
  • Status: Expired due to Term
First Claim
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1. An apparatus for automatically creating membership functions, comprising:

  • first input means for entering objective numerical-value data regarding an object along with identification codes of this data;

    first memory means for storing, in correlation with the identification codes, the numerical-value data entered by said first input means;

    second input means for entering results of subjective judgment regarding the object, these results being entered as comparative data represented using the identification codes of the numerical-value data entered by said first input means;

    second memory means for storing the comparative data entered by said second input means;

    evaluating means for assigning evaluation values in correspondence with the identification codes in accordance with a ranking based upon the comparative data stored in said second memory means;

    means for creating a histogram by arraying the numerical-value data, which has been stored in said first memory means, on a horizontal axis in accordance with the numerical values, and plotting, along a vertical axis, the evaluation values assigned to correspond to the identification codes associated with the numerical-value data;

    judging means for judging whether the histogram created by said histogram creating means is appropriate as a basis for a membership function; and

    membership-function generating means for generating a membership function based upon a histogram judged to be appropriate by said judging means.

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