-1Dfile ename   Save the motion parameters ONLY in file 'ename'.
                    The output is in 6 ASCII formatted columns:

                    roll pitch yaw dS  dL  dP

                  This file can be used in FIM as an 'ort', to detrend
                  the data against correlation with the movements.
                  This type of analysis can be useful in removing
                  errors made in the interpolation.

...
                    roll  = rotation about the I-S axis }
                    pitch = rotation about the R-L axis } degrees CCW
                    yaw   = rotation about the A-P axis }
                      dS  = displacement in the Superior direction  }
                      dL  = displacement in the Left direction      } mm
                      dP  = displacement in the Posterior direction }
...
       ** roll  = shaking head 'no' left-right
       ** pitch = nodding head 'yes' up-down
       ** yaw   = wobbling head sideways (ear toward shoulder)

1dplot -volreg FILE
1dplot -sepscl -volreg FILE