MATLAB: Am I getting “Undefined operator ‘*’ for input arguments of type ‘cell’.” when I run this code

Why would multiplication need to be defined in the last equation in my code but not in the ones above it?
if true
format long
a = 1 
b = 3*10^-7 
c = 5*10^-8 
f0 = 4*10^9 
sigma = 0.2 
t0 = 0 
tmax = 2*b 
t = 6*10^-9
omega = 2*pi*f
omega0 = 2*pi*f0
yt = a*exp((-(t-b)^2)/((2*c)^2));
Ff = sqrt(pi/2)*a*c*exp(-7.8957e+05 - 7.5398e+03i)*[erfi(4.2426)-erfi(-4.2426)]
Zf = (sqrt(-1)*sqrt(pi/2)*((a*c*sigma)/4)*exp(-((2*pi*f+omega0)*(c^2*(2*pi*f+omega0)+2*sqrt(-1)*b))))*{-exp(4*pi*c^2*f*omega0+2*sqrt(-1)*b*omega0)*[erfi(((tmax-b+sqrt(-1)*c^2)*(2*pi*f-omega0))/(sqrt(2)*c))-erfi(((t0-b+sqrt(-1)*c^2)*(2*pi*f-omega0))/(sqrt(2)*c))]+[erfi(((tmax-b+sqrt(-1)*c^2)*(2*pi*f+omega0))/(sqrt(-1)*c))-erfi(((t0-b+sqrt(-1)*c^2)*(2*pi*f+omega0))/(sqrt(-1)*c))]}
  % code
end
This is the code I'm trying to run and it is able to solve all the way up to Ff. I'm confused.

Best Answer

You use a { which creates a cell array (container). You probably want to use a [ or ( instead.
http://www.mathworks.com/help/releases/R2015a/matlab/math/matrix-indexing.html
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