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

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hamda CHAGRAOUI
hamda CHAGRAOUI 2020-2-12
评论： Walter Roberson 2020-2-22
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,...

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回答（1 个）

Alex Sha
Alex Sha 2020-2-13
Hi, as my test, if c>0.367879, there is no solution for your equations.

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