Markowitz matlabe code problem

I have a problem with QUADPROG, who can help with this. Below is code, when i run code have same error (Error using quadprog (line 144) QUADPROG requires the following inputs to be of data type double: 'X0'.).

[motleyfool]

Can you upload ur code and data?

Answer 1

[Walter Roberson]

You have

quadprog(P1Cov,c,Aineq,-r(i),beq,lb,ub,x0,options)

the syntax with 9 parameters is

quadprog(H,f,A,b,Aeq,beq,LB,UB,X0)

Matching, we see that you are passing in:

1. P1Cov for the H parameter
2. c for the f parameter
3. Aineq for the A parameter
4. -r(i) for the b parameter
5. beq for the Aeq parameter -- that does not look right
6. lb for the beq parameter -- that does not look right
7. ub for the LB parameter -- that does not look right
8. x0 for the UB parameter -- that does not look right
9. options for the X0 parameter -- that does not look right, and is triggering the error message

It looks to me as if you have failed to pass the Aeq parameter.