Good night R-Help_List, for me is a pleasure to be in this list, because in these moments I have had some problems in the develop of Object-Oriented Programing with objects S4 and S3, in specials in some packets inherited of S. In special is because I have not enough studied, because much is not enough. -------------------------------------------------------------- Marcos Amaris Gonzalez - Linux Counter #462840 http://osum.sun.com/profile/MarcosAmarisGonzalez No al SPAM! (^_^)