R - stargazer add reference categories

Question

I was wondering if someone came with a solution to show up the reference categories of categorical variables using stargazer?

library(stargazer         


        

Answer 1

You can achieve the output you want by providing covariate.labels to stargazer:

library(magrittr)
library(stringr) 
library(stargazer) 

covlabels <-
    names(lm1$coefficients)[-1] %>%
    if_else(str_sub(., 1, 4) == "gear" | str_sub(., 1, 4) == "carb", paste("\\-\\hspace{0.3cm}", .), .) %>%
    if_else(str_sub(., 18, 24) == "gear4", paste("gear (ref=3) \\\\", .), .) %>%
    if_else(str_sub(., 18, 24) == "carb2", paste("carb (ref=1) \\\\", .), .) 

stargazer(lm1, single.row = TRUE,  omit.table.layout = "sn", covariate.labels=covlabels)

yields

% Table created by stargazer v.5.2 by Marek Hlavac, Harvard University. E-mail: hlavac at fas.harvard.edu
% Date and time: Mon, Jan 08, 2018 - 3:18:09 AM
\begin{table}[!htbp] \centering 
  \caption{} 
  \label{} 
\begin{tabular}{@{\extracolsep{5pt}}lc} 
\\[-1.8ex]\hline 
\hline \\[-1.8ex] 
 & \multicolumn{1}{c}{\textit{Dependent variable:}} \\ 
\cline{2-2} 
\\[-1.8ex] & disp \\ 
\hline \\[-1.8ex] 
 gear (ref=3) \\ \-\hspace{0.3cm} gear4 & $-$202.921$^{***}$ (22.477) \\ 
  \-\hspace{0.3cm} gear5 & $-$160.898$^{***}$ (36.282) \\ 
  carb (ref=1) \\ \-\hspace{0.3cm} carb2 & 71.282$^{**}$ (27.919) \\ 
  \-\hspace{0.3cm} carb3 & 25.574 (39.919) \\ 
  \-\hspace{0.3cm} carb4 & 155.852$^{***}$ (27.355) \\ 
  \-\hspace{0.3cm} carb6 & 55.672 (68.065) \\ 
  \-\hspace{0.3cm} carb8 & 211.672$^{***}$ (68.065) \\ 
  Constant & 250.226$^{***}$ (24.363) \\ 
 \hline \\[-1.8ex] 
\hline 
\hline \\[-1.8ex] 
\end{tabular} 
\end{table}