I am trying to use the fsolve function to solve a non linear equation .In the function i created all the constants are matrices.and i expect a vector of the unknown.I keep getting error of not enough input argument.Iwould much appreciate your help.

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Honey Adams 2018-6-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/405256-i-am-trying-to-use-the-fsolve-function-to-solve-a-non-linear-equation-in-the-function-i-created-all

评论： Honey Adams 2018-6-14

采纳的回答： Torsten

TRIAL3.m

在 MATLAB Online 中打开

function F = TRIAL3(x, V1,W1 ,W, w, z, Z1,Z, p, p1, q1, q, c1, V, v, j)

a=x(1); r = x(2); s = x(3); b=x(4); g = x(5); d = x(6); h = x(7);

F = [(V1*((c1- W*r - Z*s)+(p*b- W*r*b^2 -Z*s*b.^2 - j*d*b) +(q*g- W*r*g^2- Z*s*g.^2 - j*h*g)))-1*a- a*b^2 - a*g.^2;

   (W1*((c1- V*a - Z*s)+(p*b- V*a*b^2 -Z*s*b.^2 - j*d*b) +(q*g- V*a*g^2 - Z*s*g.^2 - j*h*g)))-1*r- r*b^2 - r*g.^2;
   (Z1*((c1- V*a- W*r)+ (p*b- V*r*b^2 -W*r*b.^2 - j*d*b) +(q*g- V*a*g^2 - W*r*g.^2 - j*h*g)))-1*s- s*b^2 -  s*g.^2;
   (inv(a'*v*V*a + a'*v*W*r +a'*v*Z*s +  r'*w*V*a + r'*w*W*r+ r'*w*Z*s + s'*z*V*a+ s'*z*W*r +s'*z*Z*s)*(p1*V*a+ p1*W*r + p1*Z*s -a'*v*j*d - r'*W'*j*d +s'*Z'*j*d))-b;
   (inv(a'*v*V*a + a'*v*W*r +a'*v*Z*s +  r'*w*V*a + r'*w*W*r+ r'*w*Z*s + s'*z*V*a+ s'*z*W*r +s'*z*Z*s)*(q1*V*a+ q1*W*r + q1*Z*s -a'*v*j*h - r'*W'*j*h +s'*Z'*j*h))-g;
   (0.2*p1*j - 0.2*a'*v*j*b - 0.2*r'*w*j*b - 0.2*s'*z*j*b)- d;
   (0.2*q1*j - 0.2*a'*v*j*b - 0.2*r'*w*j*g - 0.2*s'*z*j*g)- h];

%below is my call function;

fun=@TRIAL3; Xo=[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]; X=fsolve(fun,Xo)

%my error message Error using TRIAL3 (line 5) Not enough input arguments.

Error in fsolve (line 217) fuser = feval(funfcn{3},x,varargin{:});

Caused by: Failure in initial user-supplied objective function evaluation. FSOLVE cannot continue.

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采纳的回答

Torsten 2018-6-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/405256-i-am-trying-to-use-the-fsolve-function-to-solve-a-non-linear-equation-in-the-function-i-created-all#answer_324343

在 MATLAB Online 中打开

fun = @(x)TRIAL3(x, V1,W1 ,W, w, z, Z1,Z, p, p1, q1, q, c1, V, v, j);
Xo = [1 1 1 1 1 1 1];
X = fsolve(fun,Xo)

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Honey Adams 2018-6-12

I think it worked. Thank you so much. May I have your email address if you don't mind. You saved me after a week of trying to read soo many Matlab previous questions. I am glad for your assistance.

Honey Adams 2018-6-14

Hello Tornsten,I would like to implement this same nonlinear equation with genetic algorithm.I keep getting not enough input argument,I would be glad if you could assist.Thanks for your time.

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