Hi, I presume these messages are benign but I thought I'd find out what they are referring to ... > library(lme4) Loading required package: Matrix Loading required package: lattice Attaching package: 'Matrix' The following object(s) are masked from package:stats : xtabs The following object(s) are masked from package:base : colMeans, colSums, rcond, rowMeans, rowSums ----------------- Christopher David Desjardins Ph.D. Student Quantitative Methods in Education Department of Educational Psychology University of Minnesota http://blog.lib.umn.edu/desja004/educationalpsychology/
Matrix messages when loading lme4
3 messages · Christopher David Desjardins, Daniel Ezra Johnson
It means that the Matrix package includes functions with the names listed, which as long as Matrix is loaded, supersede the original versions of those functions in the base and stats packages. If you look at one of the help pages, it should explain the change to the function. Usually this is some additional functionality and the function should be usable as before, if desired. For example, ?xtabs (or ?Matrix::xtabs) gives this notice: "This is a fully compatible extension of the standard stats package xtabs() function with the added option to produce a sparse matrix result via sparse = TRUE." Hope this helps, Dan
Thanks that's very helpful. Chris
On Dec 27, 2008, at 1:06 PM, Daniel Ezra Johnson wrote:
It means that the Matrix package includes functions with the names listed, which as long as Matrix is loaded, supersede the original versions of those functions in the base and stats packages. If you look at one of the help pages, it should explain the change to the function. Usually this is some additional functionality and the function should be usable as before, if desired. For example, ?xtabs (or ?Matrix::xtabs) gives this notice: "This is a fully compatible extension of the standard stats package xtabs() function with the added option to produce a sparse matrix result via sparse = TRUE." Hope this helps, Dan
----------------- Christopher David Desjardins Ph.D. Student Quantitative Methods in Education Department of Educational Psychology University of Minnesota http://blog.lib.umn.edu/desja004/educationalpsychology/