FF = flipf(F,DIR) returns vector or scalar fields F flipped (mirrored) 
about the vertical or the horizontal axis. DIR is: 
  'x': left-right mirror, 
  'y': top-bottom mirror, 
  'xy': both (i.e., central symmetry) 
  '': nothing. 
 
Note that the x and y axis are unchanged. 
 

 
   v = flipf(loadvec('*.vc7'), 'y'); 
   showf(v); 
 

rotatef, shiftf, extractf, truncf. 
Published output in the Help browser 
   showdemo flipf