SDP_AFFINE (Low-level) Affine transformation

   PP=SDP_AFFINE(ROT,OFFSET,LAB)

 INPUT
  RO       rotation matrix S(1)xS(2)
  OFFSET   offset vector 1xS(1)
  LAB      sdlab object with output labels

 OUTPUT
  PP       pipeline object

 DESCRIPTION
 SDP_AFFINE implements linear transformation of data using the rotation
 matrix and offset vector. Vector ROT may be used for scaling.