Problems with lsqcurvefit

In trying to fit 3 parameters in an ODE system using lsqcurvefit, but MATLAB gives me the following error message:

??? Error using ==> lsqcurvefit at 253
Function value and YDATA sizes are incommensurate.

Error in ==> fit_massb at 21
[kfinal,resn,error,exf,out,l,jac]=lsqcurvefit(@callmassb,k0,tspan,yd,lb,ub,[],x0);

What does this mean?

Answer 1

[Andrew Newell]

See Why do I receive an error message when using LSQCURVEFIT in the Optimization Toolbox?

[Peter Lützen]

Thank you very much, fixed my problem.