non-linear optimization problem - index out of bounds error

I am attempting to solve a relatively simple nonlinear optimization problem with both equality and inequality constraints. However, when running the code I receive the error:

Attempted to access x(3); index out of bounds because numel(x)=2.

My code is below. I attempted to follow the MATLAB example codes as best I could. Any ideas? Thanks in advance...

function [c,ceq]=constraints(x)

c=(-1*x(1))+(-1*x(2))+(-1*x(3));

ceq = (x(1)*sin(1.4015)*.04)+(x(2)*sin(1.199)*.035)+(x(3)*sin(0.4014)*.20)-8.25;

function f = opfun(x)

f=(x(1)*0.051)^3+(x(2)*0.054)^3+(x(3)*0.012)^3;

x0=[0,0];

options = optimoptions(@fmincon,'Display','iter','Algorithm','sqp');

[x,fval]=fmincon(@opfun,x0,[],[],[],[],[],[],@constraints,options);

[jgg]

This looks like your problem:

 x0=[0,0];

You're passing two values for x0 to start the optimizer, but it looks like the constraints and f both take 3.

 x0 = [0,0,0]; should fix this.

[Nathan]

Obvi. Should have noticed that! Thanks.