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## Problem with fsolve

**From**: |
Daniel Tourde |

**Subject**: |
Problem with fsolve |

**Date**: |
Wed, 21 Oct 1998 21:42:36 +0200 |

Hi !
I'm trying to use fsolve and I have a lot of troubles.
If I consider the following function :
function y = test2(x)
y(1) = x(1)*x(2)-2;
y(2) = x(2)^2 -4;
y(3) = x(1)^2 -1;
y(4) = x(1) + x(2) -3;
endfunction
where quite obviously the solutions are 1 and 2 if the forth condition
is taken into account, I obtain :
1 and 2 if I type [y,index] = fsolve[test2,[10,10])
index = 1
but also the wrong solution
-1 and -2 if I type [y,index] = fsolve[test2,[-10,-10])
index = 1
Where is the problem ?
Why the y(4) specification is not taken into account ?
Thanks in advance, Best regards
Daniel
--
*********************************************************************
Daniel TOURDE E-mail : address@hidden
The Aeronautical Research Institute of Sweden Tel : +46 8 634 13 44
P.O. Box 11021 S-161 11 BROMMA, Sweden Fax : +46 8 25 34 81
*********************************************************************

**Problem with fsolve**,
*Daniel Tourde* **<=**