Add mday to features argument in step_date()

NAMESPACE

@@ -748,6 +748,7 @@ importFrom(lubridate,am)
 importFrom(lubridate,decimal_date)
 importFrom(lubridate,hour)
 importFrom(lubridate,is.Date)
+importFrom(lubridate,mday)
 importFrom(lubridate,minute)
 importFrom(lubridate,month)
 importFrom(lubridate,quarter)

NEWS.md

@@ -34,6 +34,8 @@
 
 * `step_dummy()` now throws more informative warnings for `NA` values. (#450)
 
+* `step_date()` now accepts `"mday"` as a possible feature. (@Edgar-Zamora, #1211)
+
 ## Bug Fixes
 
 * `NA` levels in factors aren't dropped when passed to `recipe()`. (#1291)

R/date.R

@@ -9,7 +9,7 @@
 #'  for this step. The selected variables should have class `Date` or
 #'  `POSIXct`. See [selections()] for more details.
 #' @param features A character string that includes at least one
-#'  of the following values: `month`, `dow` (day of week),
+#'  of the following values: `month`, `dow` (day of week), `mday` (day of month),
 #'  `doy` (day of year), `week`, `month`,
 #'  `decimal` (decimal date, e.g. 2002.197), `quarter`,
 #'  `semester`, `year`.
@@ -98,6 +98,7 @@ step_date <-
       c(
         "year",
         "doy",
+        "mday",
         "week",
         "decimal",
         "semester",
@@ -202,6 +203,9 @@ get_date_features <-
     if ("doy" %in% feats) {
       res[, grepl("doy$", names(res))] <- vec_cast(yday(dt), integer())
     }
+    if ("mday" %in% feats) {
+      res[, grepl("mday$", names(res))] <- vec_cast(mday(dt), integer())
+    }
     if ("week" %in% feats) {
       res[, grepl("week$", names(res))] <- vec_cast(week(dt), integer())
     }

R/recipes-package.R

@@ -62,6 +62,7 @@
 #' @importFrom lubridate wday
 #' @importFrom lubridate week
 #' @importFrom lubridate yday
+#' @importFrom lubridate mday
 #' @importFrom lubridate year
 #' @importFrom Matrix Matrix
 #' @importFrom purrr map

tests/testthat/test-date.R

@@ -51,7 +51,7 @@ test_that("default option", {
 
 test_that("nondefault options", {
   date_rec <- recipe(~ Dan + Stefan, examples) %>%
-    step_date(all_predictors(), features = c("dow", "month"), label = FALSE)
+    step_date(all_predictors(), features = c("dow", "month", "mday"), label = FALSE)
 
   date_rec <- prep(date_rec, training = examples)
   date_res <- bake(date_rec, new_data = examples)
@@ -61,8 +61,10 @@ test_that("nondefault options", {
     Stefan = examples$Stefan,
     Dan_dow = wday(examples$Dan, label = FALSE),
     Dan_month = month(examples$Dan, label = FALSE),
+    Dan_mday = mday(examples$Dan),
     Stefan_dow = wday(examples$Stefan, label = FALSE),
-    Stefan_month = month(examples$Stefan, label = FALSE)
+    Stefan_month = month(examples$Stefan, label = FALSE),
+    Stefan_mday = mday(examples$Stefan)
   )
 
   expect_equal(date_res, date_exp)