[R] Error in a regression

Hi guys, When I try to do a linear regression into the console appears this warning message: >* attempting model selection on an essentially perfect fit is nonsense* Some one could tell me what does it mean and maybe a way to solve it. Thanks in advance, Andrea Marcela [[alternative

[R] How to construct a double-entry with variables from a dataset

Hi everyone, My name is Marcela, I am bachelor student of statistics. I have a data frame with 59 variables and two of them are categorical and have three levels each one, I would like to construct a double -entry table with this variables, I mean the categorical ones. Any help will be really