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Create and evaluate models using 'tidymodels' and 'h2o'

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A follow-up to #52. Now that tune 1.2.0 made it to CRAN a couple weeks ago, the recent changes in agua should be ready to go to CRAN! This will...

> ## The problem I cannot seem to tune with H20, I keep getting an "unused argument" error. I was using an example that used keras (which works fine) and...

Original bug found in https://github.com/tidymodels/censored/pull/269. It isn't that much work for us to specify it and it stops us from being bitten later down the line.

Adds some clarification and benchmark results to the parallel processing vignette. Once this is merged (and pkdown finishes), I'll never the version number to the dev value and commit to...

Getting following error when fitting drf model Warning: stack imbalance in 'as.environment', 249 then 246 *** caught segfault *** *** caught segfault *** *** caught segfault *** address 0x64209498, cause...

Set `options(prefer_RCurl=FALSE)` to opt out of RCurl * For tests involved tuning, `h2o_start()` in every chunk * For other tests using the h2o server ,`h2o_start()` in each file Tuning tests...

In the tune release following 1.2.1, tune's `.catch_and_log(split)` argument will be renamed to `.catch_and_log(split_labels)`, and will take the format `labels(split)` rather than `split`. agua just passes that argument once here:...

With `tune::tune_grid`, I bump into the **"Warning: All models failed ..."**, which is due to "**Error in** `h2o.getConnection()`: **No active connection to an H2O cluster ..."**. Although the output of...