-- --&gt;

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class: middle, center

# Quiz

How we can expand a list column to see what is in it?

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`tidyr::unnest()`

.footnote[https://tidyr.tidyverse.org/reference/unnest.html]

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```r
lm_split %&gt;% 
  unnest(.metrics)
## # A tibble: 2 x 8
##   splits    id      .metric .estimator .estimate .notes  .predictions  .workflow
##   &lt;list&gt;    &lt;chr&gt;   &lt;chr&gt;   &lt;chr&gt;          &lt;dbl&gt; &lt;list&gt;  &lt;list&gt;        &lt;list&gt;   
## 1 &lt;split [‚Ä¶ train/‚Ä¶ rmse 