::: {.cell hash='03_Data_preprocessing_cache/revealjs/unnamed-chunk-37_742aafa068487ba9d50ca192c72a5550'}

```{.r .cell-code}
y <- tribble(
  ~key, ~val_y,
     1, "y1",
     2, "y2",
     4, "y3" 
)
```
:::