## ----setup, include = FALSE---------------------------------------------------
knitr::opts_chunk$set(collapse = TRUE, comment = "#>")
set.seed(1234)

## ----load---------------------------------------------------------------------
library(blockwise)
data(house)
str(house)

## ----pipeline-----------------------------------------------------------------
house_miss <- simulate_blockwise_missing(
  house,
  blocks = list(
    c("sqft_living", "sqft_lot", "sqft_above"),
    c("bedrooms", "bathrooms", "floors", "grade")
  ),
  prop_missing = 0.30,
  noise        = 0.05
)

set.seed(1234)
idx <- sample(nrow(house_miss), floor(0.75 * nrow(house_miss)))
train <- house_miss[idx, ]
test  <- house_miss[-idx, ]

X_train <- train[, setdiff(names(train), "price")]
y_train <- train$price
X_test  <- test[,  setdiff(names(test),  "price")]
y_test  <- test$price

set.seed(1234)
fit <- brm(X_train, y_train, learner = learner_lm())
fit

pred <- predict(fit, X_test)
cat("RMSE:", round(sqrt(mean((y_test - pred)^2)), 0), "\n")