MATLAB: Jacoabian doesn’t work jacoabian Hello, I want to calculate J=jacobian(f_algebr, yss); But I get Errors. I uploaded my mat file so you can see what f_algebr and yss is. https://docs.google.com/open?id=0B8e1LayVdzefQkJNekduXy1PNW8 Thank you Best Answer In MuPAD, x(7) is to invoke the function x with argument 7. x[7] would be used to index the vector x at its 7th element.The simplest way to resolve your difficulty would be to subs() variable names such as x1 for x(1) Related SolutionsMATLAB: Jacobian function and derivative that is a fraction Although the documentation doesn't say so, I would guess that the Jacobian cannot be taken with respect to a symbolic expression like F/V. It has to be with respect to a named variable. So, replace F/V with its own variable like below, syms CA CB Fv CAi k1 k2 k3 f1 = (Fv)*(CAi-CA)-k1*CA-k3*CA^2; f2 = -(Fv)*CB + k1*CA - k2*CB; A = jacobian([f1; f2], [CA CB]); B = jacobian([f1; f2], [Fv CAi]) MATLAB: Diff of order n around a point x0 Do you have the Symbolic Toolbox and an expression for your function?syms tx = cos(2*t);y = diff(x,2)subs(y,0) %evaluate the 2nd derivative at t=0 Related QuestionError when solving system of equations with fsolveHow to correct this error? “Undefined operator ‘/’ for input arguments of type ‘function_handle’.”How to calculate derivative of a stringValue swappingSubstitute derivative array functionWhat is the error in this code
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