Hi,mottelet Now I understand I don't need to provide the value of 'Ind '. As explained in the help page, 'the ind input argument is a message sent from the solver to the cost function ' .
Also I understand I have to provide the gradient explicitly even if I don't need its value. Unless an user does't provide the gradient explicitly, the solver must estimate it numerically even if there is an analytical form of the gradient. In general numerical estimation is time-consuming compared with the the analytical form. So solver asks a user to provide the gradient explicitly to avoid time-consuming estimation. Best regards -- View this message in context: http://mailinglists.scilab.org/optim-tp4033329p4033339.html Sent from the Scilab users - Mailing Lists Archives mailing list archive at Nabble.com. _______________________________________________ users mailing list [email protected] http://lists.scilab.org/mailman/listinfo/users
