How to use function int() in objective function

[POLLY]

Hello,

I'm a beginner of yalmip and I hope that you can spare your valuable time to help me solve the problem.  

Recently,I am writing an objective function which contains function int() which is attached below:

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p=sdpvar(1,1);

syms x

Objective=int(p*x,x,1,2);

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and the problem is:

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Error using sdpvar/subsref (line 180)

Undefined function 'any' for input arguments of type 'sym'.

Error in coefficients (line 60)

    allvar = depends(p(i));

Error in int_sdpvar (line 15)

    [c,v] = coefficients(f,x(i));

Error in sdpvar/int (line 33)

F = int_sdpvar(f,x,from,to);

Error in ED3_analysis (line 64)

Objective=int(p*x,x,1,2);

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I have spent a lot of time but still can't figure it out.

Thanks in advance, 

Polly

[Johan Löfberg]

You cannot use sym variables in a YALMIP model

Perhaps help sdpvar/int could set you on the right track