[Scilab-users] fminsearch, error occurs after changing variable name

[Jens Simon Strom]

Hello Scilab experts,

This script functions:

function SAQ=!f(p), SAQ=sum( ( p(1)+p(2)*xi-yi ).^2 ), endfunction
xi=1:1000 ;
yi=2*xi+3;
popt=fminsearch(!f,[0;0])

If I replace yi by y everywhere the script functions too as expected.

If I replace xi by x everywhere an error occurs: "Inconsistent subtraction in
function !f. 

What is wrong here?

Kind regards
Jens