solving simultaneous equations with fsolve

Hello,

I was given the code:

xo=1 ;

fun=@(X) [sum(X)-2; X(2).^2 -X(3)-5 ; X(1)+X(3.)^3-2];

x = fsolve(fun,xo)

But when I try to run it, I get the following error:

Index exceeds matrix dimensions.

Error in @(X)[sum(X)-2;X(2).^2,-X(3)-5;X(1)+X(3.)^3-2]

Error in fsolve (line 241) fuser = feval(funfcn{3},x,varargin{:});

Error in test2 (line 4) x = fsolve(fun,xo)

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

Can someone please explain why this isnt working?

Thanks!

Mike

Answer 1

[Matt J]

Your problem is 3-dimensional, but the initial guess you gave x0=1 is only 1-dimensional.