you can write a .m file and wrap it into a block, then you can use it in
Simulink.
	

Dear all,,,
	  We know that the function 'premnmx' can be used to normalise
data/vector fall in between  [-1  1].
   
  But, i  wanna know how to perform such thing in SIMULINK. which block has to
be used. ???
	  Thanks... 
   
  (M. IWAN )
	Mahmud Iwan S (iwan)
T.E-UGM96
Master of Mechatronics. IIU Malaysia