Error using fzero. I don't know where to place the (.) properly. Please help

Here's the error code:

Error using fzero (line 289)
FZERO cannot continue because user supplied function_handle ==>
@(f)(1/sqrt(f)+0.86*2.303*log(E(a)./3.7+2.51/(Re.*sqrt(f))))
failed with the error below.

 Matrix dimensions must agree.

Error in LBYCHEH_EA2_Ex42_ChengVillalva_CindyMako (line 11)
  z = fzero(x,30)

Codes:

Re = 1500:15000;
E = [0.00001;0.00005;0.0001;0.0005;0.001;0.005;0.01;0.03;0.05;0.07;0.09;0.1];
hold all;
a = 1;
while a<12
  f = 0.16*Re.^(-0.16)
  x = @(f)(1/sqrt(f) + 0.86*2.303*log(E(a)./3.7 + 2.51/(Re.*sqrt(f))))
  z = fzero(x,30)
  loglog(Re,z);
  a = a + 1;
end

grid on;
title('Colebrook-White Moody Chart');
xlabel('Reynolds number, Re');
ylabel('Fanning friction factor, f');

Answer 1

[Shashank Prasanna]

At a quick glance you are missing a dot '.' after 2.51

    x = @(f)(1/sqrt(f) + 0.86*2.303*log(E(a)./3.7 + 2.51./(Re.*sqrt(f))))

Try that

[mscv]

Still won't work :(

It says:

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

Error in fzero (line 308) elseif ~isfinite(fx) ~isreal(fx)

Error in LBYCHEH_EA2_Ex42_ChengVillalva_CindyMako (line 11) z = fzero(x,30)

[Shashank Prasanna]

You use f twice. You may want to use a different variable

f = 0.16*Re.^(-0.16)

x = @(f)(1/sqrt(f) + 0.86*2.303*log(E(a)./3.7 + 2.51/(Re.*sqrt(f))))

[mscv]

Thank you!