code: def setcoef(self, Z):
          
  
          # If the dictionary has a single channel but the input (and
          # therefore also the coefficient map array) has multiple
          # channels, the channel index and multiple image index have
          # the same behaviour in the dictionary update equation: the
          # simplest way to handle this is to just reshape so that the
          # channels also appear on the multiple image index.
          if self.cri.Cd == 1 and self.cri.C > 1:
              Z = Z.reshape(self.cri.Nv + (1,) + (self.cri.Cx * self.cri.K,) +
                            (self.cri.M,))
          self.Z = np.asarray(Z, dtype=self.dtype)
  
          self.Zf = sl.rfftn(self.Z, self.cri.Nv, self.cri.axisN)
docs: Set coefficient array.