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## Re: fsolve returns a complex solution instead of a real one

**From**: |
Tatsuro MATSUOKA |

**Subject**: |
Re: fsolve returns a complex solution instead of a real one |

**Date**: |
Mon, 10 Jun 2019 17:58:37 +0900 (JST) |

----- Original Message -----
>* From: Loro51 *
>* To: help-octave*
>* Cc: *
>* Date: 2019/6/9, Sun 09:22*
>* Subject: fsolve returns a complex solution instead of a real one*
>* *
>* Dear All, *
>* *
>* Maybe I am doing something wrong. In this case, please let me know*
>* *
>* I develop a simple code to calculate the chemical equilibrium from a*
>* composition at some temperature and on the uploaded file you can find the*
>* equations.*
>* *
>* As I run CC_Micro_Turbina_Gas_Trabalho_BE on the Command Window on Debian 9*
>* (Octave version 4.0.3) I get a complex solution with info = 3 instead of a*
>* real solution as it should be. What am I doing wrong?*
>* *
>* All the properties were tested and are Ok*
>* *
>* All the best*
>* *
>* *
Document of fsolve states :
options is a structure specifying additional parameters which control the
algorithm.
Currently, fsolve recognizes these options:
"AutoScaling", "ComplexEqn", "FinDiffType", "FunValCheck", "Jacobian",
"MaxFunEvals", "MaxIter", "OutputFcn", "TolFun", "TolX", "TypicalX", and
"Updating".
Did you specify "ComplexEqn" option?
Tatsuro