ISNOMINAL Check if the data set contains nominal features

   I=ISNOMINAL(D)

 INPUT
    D     sddata object

 OUTPUT
    I     logical value

 DESCRIPTION
 ISNOMINAL returns 1 if the data set A contains at least one nominal
 feature. This means that there is A.feattype sdlab feature property and
 A.featlist cell array feature property present.

 SEE ALSO
 SDNOMINAL