CNFUnion

 Merge the sets of the antecedent parts of two rules.

      fis=CNFUnion(fis,m,k)

 Calculate the CNF union of the antecedents of two rules merging the sets 
 in each antecedent dimsnsion. The fis structure including the rules is 
 also corrected.
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 Parameters
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 fis - Complex structure describing a fuzzy inference system.

       fis--input(i) --name
          |          |-range
          |          |-mf(j)--name
          |                 |-type
          |                 |-params
          |                 |-paramsy
          |-output(i)--name
          |          |-range
          |          |-mf(j)--name
          |                 |-type
          |                 |-params
          |                 |-paramsy
          |-rule(m)--antecedent(i)
          |        |-consequent(j)
          |        |-weight
          |        |-connection
 m   - Number of the first rule.
 k   - Number of the second rule.
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 Returned values
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 inf                - Lower endpoint of the cut.
 sup                - Upper endpoint of the cut.
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 Remarks
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 Zsolt Csaba Johanyák, johanyak.csaba@gamf.kefo.hu, v. 1.2,  27 February
 2007.