Why does it give me errors during numerical integration?

Greetings,

When I run the following code for a numerical integration:

T = @(x) T0 + (-Hrxn)./(CpSum).*x;
K = @(x) K0.*exp(-E0./(R.*T));
Keq = @(x) exp(-4.33+4577.9./T);
yA = @(x) FA0./FT.*(1-x);
yB = @(x) FB0./FT.*(thetaB-x);
yC = @(x) FC0./FT.*(thetaC+x);
yD = @(x) FD0./FT.*(thetaD+x);
rA = @(x) K.*(yA.*yB-yC.*yD./Keq); 
V = integral(@(x) FA0./rA,0,0.493647527)

it shows the following error:

I believe it has to do with the function handle or operators, but I could not figure it out.

Answer 1

[Torsten]

T0=1;Hrxn=1;CpSum=1;K0=1;E0=1;R=1;FA0=1;FB0=1;FC0=1;FD0=1;thetaB=1;thetaC=1;thetaD=1;FT=1;
T = @(x) T0 + (-Hrxn)./(CpSum).*x;
K = @(x) K0.*exp(-E0./(R.*T(x)));
Keq = @(x) exp(-4.33+4577.9./T(x));
yA = @(x) FA0./FT.*(1-x);
yB = @(x) FB0./FT.*(thetaB-x);
yC = @(x) FC0./FT.*(thetaC+x);
yD = @(x) FD0./FT.*(thetaD+x);
rA = @(x) K(x).*(yA(x).*yB(x)-yC(x).*yD(x)./Keq(x)); 
V = integral(@(x) FA0./rA(x),0,0.493647527)

V = 4.4877