TY 2022 data about taxable value per major property class (#18)

* Initial commit

* Complete first draft

* Update renv lock

* Add additional major class sheet to output

* Code cleanup

* Commenting

.gitignore

@@ -25,3 +25,4 @@
 *.Rda
 *.parquet
 **/renv/activate.R
+*.db

data-requests/pdr-issue-0017/pdr-issue-0017.R

@@ -0,0 +1,50 @@
+# See https://github.com/ccao-data/public/issues/17
+
+library(dplyr)
+library(openxlsx)
+library(ptaxsim)
+library(purrr)
+
+# Create the DB connection with the default name expected by PTAXSIM functions
+ptaxsim_db_conn <- DBI::dbConnect(RSQLite::SQLite(), "ptaxsim/ptaxsim.db")
+
+# Gather a list of all '22 parcels
+eav22 <- DBI::dbGetQuery(
+  ptaxsim_db_conn,
+  "
+  SELECT DISTINCT pin
+  FROM pin
+  WHERE year = 2022
+  "
+) %>%
+  pull(pin)
+
+# Use tax_bill() to obtain EAVs for all '22 parcels, filter our rows that don't
+# pertain to a parcel's municipality. It's worth noting here that this sample
+# will NOT include all '22 parcels due to this filter - any parcels that don't
+# include a "muni" component in their tax bill will not show up in this output
+munis <- tax_bill(year_vec = 2022, pin_vec = eav22) %>%
+  filter(agency_minor_type == "MUNI") %>%
+  mutate("Major Class" = substr(class, 1, 1)) %>%
+  rename("Minor Class" = class)
+
+# Aggregate by class and municipality, output
+c("Minor Class", "Major Class") %>%
+  set_names() %>%
+  map(function(x) {
+    munis %>%
+      summarise(
+        num_pins = n(),
+        median_eav = median(eav, na.rm = TRUE),
+        total_eav = sum(eav, na.rm = TRUE),
+        .by = c({{ x }}, agency_name)
+      ) %>%
+      select(
+        Municipality = agency_name,
+        Class = {{ x }},
+        `Num Parcels` = num_pins,
+        `Median EAV` = median_eav,
+        `Total EAV` = total_eav
+      )
+  }) %>%
+  write.xlsx("eavs22.xlsx")

data-requests/pdr-issue-0017/pdr-issue-0017.Rproj

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+Version: 1.0
+
+RestoreWorkspace: Default
+SaveWorkspace: Default
+AlwaysSaveHistory: Default
+
+EnableCodeIndexing: Yes
+UseSpacesForTab: Yes
+NumSpacesForTab: 2
+Encoding: UTF-8
+
+RnwWeave: Sweave
+LaTeX: pdfLaTeX
+
+AutoAppendNewline: Yes
+StripTrailingWhitespace: Yes