Documentation issue: rand_forest function help falsely lists h2o as an engine option

[birbritto]

when calling the help on rand_forest:

?rand_forest

It lists h2o in the engine-specific pages for the model, implying that that's an option for an engine. However, using:

show_engines('rand_forest') gives:

# A tibble: 6 × 2
  engine       mode          
  <chr>        <chr>         
1 ranger       classification
2 ranger       regression    
3 randomForest classification
4 randomForest regression    
5 spark        classification
6 spark        regression 

and trying to use h2o gives this error:

rf_fit <- rand_forest(trees = 100, mode = "unknown") %>%
+   set_engine("h2o")  %>% fit ( something ~ var1 + var2 etc, data = training_data)

Error in `set_engine()`:
! Engine 'h2o' is not supported for `rand_forest()`. See `show_engines('rand_forest')`.

Requesting an update to the documentation if that makes sense. Thank you

[simonpcouch]

Thanks for the issue!

The rand_forest docs note that h2o requires a parsnip extension package with the "2" superscript. From ?rand_forest

Clicking the h2o hyperlink from the docs will show that you need to load the agua extension package with library(agua) to use this engine. :)

I will keep this issue open in case we think we might be able to provide better errors or docs to make this visible to folks.

[github-actions]

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