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<DIV><FONT face=Arial size=2>I was trying to minimize this function but got this
error:</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>> L_function(alfa,beta,sigma2){<BR>+ -1*
(-n/2*log(sigma2))+0.5*sum((y-g(alfa,beta))^2)/sigma2<BR>+
}<BR>> inic_c(0.3893,0.507,0.00228)<BR>> optim(inic,L)<BR>Error in
log(sigma2) : Argument "sigma2" is missing, with no default<BR></FONT></DIV>
<DIV><FONT face=Arial size=2> Any clues?</FONT></DIV>
<DIV><FONT face=Arial size=2> </DIV></FONT></BODY></HTML>