How can i solve the error "Reference to non-existent field 'xShape'. Error in finDiffEvalAndChkErr Error in finitedifferences'"

c = -1; % define parameter first
      x = fsolve(@(x) myfun(x,c),[-5;-5])

function F = myfun(x,c)
      F = [ 2*x(1) - x(2) - exp(c*x(1))
            -x(1) + 2*x(2) - exp(c*x(2))];

Reference to non-existent field 'xShape'.

Error in finDiffEvalAndChkErr

Error in finitedifferences

Error in trustnleqn (line 107)

[JACfindiff,~,~,numFDfevals,evalOK] = finitedifferences(x,funfcn{3},[],[],[],Fvec,[],[],

...

Error in fsolve (line 367)

trustnleqn(funfcn,x,verbosity,gradflag,options,defaultopt,f,JAC,...

[Walter Roberson]

Which release are you using? The code works on my machine.

Answer 1

[Alex Sha]

Hi, as my test, if c>0.367879, there is no solution for your equations.

[Walter Roberson]

Right, but c=-1 is given.