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bbflipdim  Create an operator that flips along specified dimension.
   [BB,DIM2]=bbflipdim(DIM1,FDIM) creates an N-by-N black-box operator
   that flips the hypercube with dimensions given in DIM1 along the
   dimension(s) specified by FDIM.

   DIM2 is the dimension of the transformed hypercube, which is the
   same as DIM1.

   See also bbredim.