Error using fzero in a loop

I'm trying to solve a transcendental equation for "i", for all values in my "v" array. I'm getting an error when using fzero in a loop:

 Operands to the || and && operators must be convertible to logical scalar values.

Error in fzero (line 327)
    elseif ~isfinite(fx) || ~isreal(fx)

Error in RealisticDiodeModel (line 15)
    i_arr(index) = fzero(fun, v(index));

Here's my code

for index = 1:n
  disp(index);
  fun = @(i)IO.*(exp((v + i.*Rser)./(kToq.*eta)) - 1) + (v./Rsh) + i.*(1 + (Rser./Rsh)) - IL;
  i_arr(index) = fzero(fun, v(index));
end

Where "n" is the size of my "v" array, and "Rser", "kToq", "eta", "Rsh", "IO", and "IL" are predefined constants. Thanks in advance!

Answer 1

[Matt J]

Your fun() does not return a scalar value (because v is not a scalar).

[Ajay Gupta]

Thanks!