error using 'linearize' command in matlab

*when i use the matlab's own example of* http://www.mathworks.com/help/mpc/examples/control-of-a-multi-input-multi-output-nonlinear-plant.html running this example gives the following error,

Undefined function 'is' for input arguments of type 'char'.

Error in linearize (line 16) if is(p,'linear') & ~is(p,'compound')

Error in mpcnonlinear (line 23) model = linearize('mpc_nonlinmodel');

after changing is to isa, the program gives again this following error,

Error using mupadmex Error in MuPAD command: Index exceeds matrix dimensions.

Error in sym/subsref (line 687) B = mupadmex('symobj::subsref',A.s,inds{:});

Error in linearize (line 34) plin = p0+double(jacobian(p,x))*(x-x0);

Error in mpcnonlinear (line 23) model = linearize('mpc_nonlinmodel');

please help..

Answer 1

[sharmin]

I found the solution of the problem.. the mpt toolbox has a linearize function, which was shadowing the original command of matlab. after uninstalling mpt toolbox, it is working fine.

thank you.