MATLAB: Why is the code not working

cycle not working

I should make an iterative cylce, yet when trying to run it gives me this error
Array indices must be positive integers or logical values.
for i= linspace(0.0001,0.0009,1000)
     Fm= (0.25).*(((log((2.7*10^-5)+(2.51.*((Rey.*sqrt(i).^-1))))).^-1).*((log((2.7*10^-5)+(2.51.*((Rey.*sqrt(i).^-1)))))).^-1);
     if Fm(i)-Fm(i+1)<= abs(10^-6)
         break
     end
end

Best Answer

i= linspace(0.0001,0.0009,1000)
%.................^ ...........^............
Array indices must be non zero positive integer
like 
linspace(1,1,1000)
Aprat from the above issue there is undefined function or variable 'Rey'. Ensure that it is there in your complete code.
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