Error in coding a user defined MATLAB function

Please I am getting error in using a "for" or "if" statement in a MATLAB user defined block.

[Chaya N]

You can certainly use both. Would you mind posting your actual code here so we could see why you get such an error.

[Monday Ikhide]

Here is it please. The code seems NOT to work for Matlab function block. Its meant for real time applications

for i=3:inf 
voltage_Ave(i)=(voltage(i)+ voltage(i-1)+voltage(i-2))/3; 
end