Nothing
## ----setup, include=FALSE-----------------------------------------------------
knitr::opts_chunk$set(echo = TRUE)
## ----eval=FALSE---------------------------------------------------------------
# fcs <- feature_columns(column_numeric("drat"))
# input <- input_fn(mtcars, response = "mpg", features = c("drat", "cyl"), batch_size = 8L)
# lr <- linear_regressor(
# feature_columns = fcs
# ) %>% train(
# input_fn = input,
# steps = 2,
# hooks = list(
# hook_progress_bar()
# ))
## ----eval=FALSE---------------------------------------------------------------
# lr <- linear_regressor(feature_columns = fcs)
# training_history <- train(
# lr,
# input_fn = input,
# steps = 4,
# hooks = list(
# hook_history_saver(every_n_step = 2)
# ))
## ----eval=FALSE---------------------------------------------------------------
# mean_losses_history <<- NULL
# hook_history_saver_custom <- function(every_n_step) {
#
# iter_count <<- 0
#
# session_run_hook(
#
# before_run = function(context) {
# session_run_args(
# losses = context$session$graph$get_collection("losses")
# )
# },
#
# after_run = function(context, values) {
# iter_count <<- iter_count + 1
# print(paste0("Running step: ", iter_count))
# if (iter_count %% every_n_step == 0) {
# raw_losses <- values$results$losses[[1]]
# mean_losses_history <<- c(mean_losses_history, mean(raw_losses))
# }
# }
# )
# }
## ----eval=FALSE---------------------------------------------------------------
# lr <- linear_regressor(
# feature_columns = fcs
# ) %>% train(
# input_fn = input,
# steps = 4,
# hooks = list(
# hook_history_saver_custom(every_n_step = 1)
# ))
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