lu-xuzhaowei > install.packages("mass") --- Please select a CRAN mirror for use in this session --- Warning messages: 1: package ‘mass’ is not available (for R version 3.0.2) 2: Perhaps you meant ‘MASS’ ? >
lu-xuzhaowei 回复 第2楼 的 Ihavenothing：Error in sprintf(gettext(fmt, domain = domain), ...) : invalid format '%d'; use format %s for character objects 请问一下这个是什么问题啊。
