title: How to export a table made with tab_df function (sjPlot library) as a png document in R version 3.5.3
body: <p>I am trying to export the table with the <code>tab_df</code> command. However, when I try to export it, R says, "Error in 1:nrow(x) : argument of length 0". What other ways can I try to export my table with the <code>tab_df</code> function?</p>
  
  <pre><code>mydataframe &lt;- tab_df(old_data_frame, alternate.rows = TRUE, title = "Table 2. RNA Sequences", show.footnote = TRUE, footnote = "Abbreviations - RNA: ribonucleicacid.")
  
  png("~/Desktop/name_of_picture.png")
  tab_df(mydataframe)
  dev.off()
  </code></pre>