[ERROR] Index exceeds array dimensions. Index value 0 exceeds valid range [1-1] of array Coeff.p01.

Hi, I am a new user of Simulink.

I am runnig a simulation in wich I inserted a Matlab function.

I recive the error:

Index exceeds array dimensions.  Index value 0 exceeds valid range [1-1] of array Coeff.p01.

That function work like this:

It load a workspace with the values of the variable It need, just number, not matrix or array, and compute the output.

I don't understand why it says that the index value is 0.

Here the code:

function eta_motor = eta_motor(omega_wheel,torque)
Coeff=load('Coeff');
eta_motor=(Coeff.p00+Coeff.p10*(omega_wheel*Coeff.a/Coeff.omega_max)+Coeff.p01(torque*Coeff.b/Coeff.T_max)+...
    Coeff.p20(omega_wheel*Coeff.a/Coeff.omega_max)^2+Coeff.p11(omega_wheel*Coeff.a/Coeff.omega_max)*(torque*Coeff.b/Coeff.T_max)+...
    Coeff.p02(torque*Coeff.b/Coeff.T_max)^2)/100;

Can you explain me how to correct it?

Answer 1

[per isakson]

I guess that this term causes the error

Coeff.p01(torque*Coeff.b/Coeff.T_max)

and that's because torque*Coeff.b/Coeff.T_max evaluates to zero

And by the way always report the full error message.

[Giuseppe Dibenedetto]

ok, thank's I solved it.