Can Tidymodels' XGBoost predict 2 things (multivariate) at once? Regression

[cwright1]

I watched and followed along with many of the outstanding Tidy Tuesday examples taught by @julia to learn Tidymodels. I believe what I'm trying to do is going to be most similar to the following example that I've modified from tidymodels.org (XGBoost Regression) .

'Ridership' from the Chicago dataset was predicted from 2 columns. What if instead I want to predict Ridership and Cubs_Home , and from all columns ? Is this possible?

library(tidymodels)
tidymodels_prefer()
data(Chicago)

n <- nrow(Chicago)

#split into training and testing sets
Chicago_train <- Chicago[1:(n - 7), ]
Chicago_test <- Chicago[(n - 6):n, ]

#model specs
bt_reg_spec <- 
  boost_tree(trees = 15) %>% 
  # This model can be used for classification or regression, so set mode
  set_mode("regression") %>% 
  set_engine("xgboost")
bt_reg_spec

#Fit model
set.seed(1)
bt_reg_fit <- bt_reg_spec %>% fit(ridership ~ ., data = Chicago_train)

#############What if you want to predict ridership AND Cubs_Home?######################
#fit(ridership + Cubs_Home ~., data = Chicago_train) #### would it be this?????********
#######################################################################################

#Run prediction on test set
results_df <- data.frame("observed"=Chicago_train$ridership,
                         "predicted"=predict(bt_reg_fit, Chicago_test))

#What's the correlation?
cor(results_df$observed, results_df$.pred)

[1] 0.8854543

[nirgrahamuk]

You should make a model that predicts one of the targets, and then another model that predicts the other

[Max]

Yes, tidymodels really only supports single dimensional outcomes.