Dear, i am using the programming of the package "sampleSelection" for a study and I do not understand the error of my simulation, I posted the detailed doubt in stackoverflow! Link below:
http://stackoverflow.com/questions/41404416/return-of-the-gradient-function-when-using-optim-functions-and-colsums Thank you! best regards, Fernando de Souza Bastos Teacher of Mathematics and Statistics Universidade Federal de Viçosa (UFV) Campus UFV - Florestal PhD in progress in Statistics Universidade Federal de Minas Gerais (UFMG) [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
