X-Git-Url: http://git.vanrenterghem.biz/R/project-au-taxstats.git/blobdiff_plain/49286c850b490d5617b8eaf4485671f52d264a7e..a4d86b2c1b034830351c7d5d9e72a1acb2d36a29:/AU-taxstats.R

diff --git a/AU-taxstats.R b/AU-taxstats.R
index bda1448..76f9dcf 100644
--- a/AU-taxstats.R
+++ b/AU-taxstats.R
@@ -4,6 +4,7 @@ install.packages("devtools")
 devtools::install_github("tidyverse/ggplot2") # needed for geom_sf
 library(ggplot2)
 library(viridis)
+library(ggthemes)
 
 # Obtain the tax dataset if not available yet
 if(!file.exists("data/taxstats2015individual06ataxablestatusstateterritorypostcode.csv")) 
@@ -44,13 +45,28 @@ taxstats.sa3 <- merge(x = taxstats, y = sa3, by.x = "Postcode", by.y = "POA_CODE
 # Create a matrix of intersecting postal codes and SA3's
 
 POA_SAs <- st_intersects(x=sa3, y=POA, sparse=FALSE)
-taxstats.POA$incomeperearningcapita[is.na(taxstats.POA$incomeperearningcapita)] <- 0
-
+taxstats.POA$`Total.Income.or.Loss..`[is.na(taxstats.POA$`Total.Income.or.Loss..`)] <- 0
+taxstats.POA$`Total.Income.or.Loss.no.`[is.na(taxstats.POA$`Total.Income.or.Loss.no.`)] <- 0
 # Perform matrix multiplication to obtain the income metrix per SA3
 # Total income will be incorrect, as the POAs intersect with multiple SA3s
-sa3$incomeperearningcapita <- as.vector(POA_SAs %*% as.matrix(taxstats.POA$incomeperearningcapita))
+sa3$TotalIncome <- as.vector(POA_SAs %*% as.matrix(taxstats.POA$`Total.Income.or.Loss..`))
+sa3$TotalIncomeEarners <- as.vector(POA_SAs %*% as.matrix(taxstats.POA$`Total.Income.or.Loss.no.`))
+sa3$incomeperearningcapita <- (sa3$TotalIncome / sa3$TotalIncomeEarners)/1000
+
+# As SA3s are still to narrow around cities compared to in the country,
+# let's simply look at Melbourne
 
-ggplot(sa3) +
+ggplot(dplyr::filter(sa3, data.table::`%like%`(GCC_NAME16, "Melbourne") )) +
   geom_sf(aes(fill = incomeperearningcapita, color = incomeperearningcapita)) +
-  scale_fill_viridis("incomeperearningcapita") +
-  scale_color_viridis("incomeperearningcapita")
+  scale_fill_viridis(name = "") +
+  scale_color_viridis(name = "") +
+  coord_sf(datum = NA) + # Work around https://github.com/tidyverse/ggplot2/issues/2071 to remove gridlines
+  labs(title = "Melbourne \nincome distribution",
+       subtitle = "2014/15, in 1000s AUD",
+       caption = "\nSource: Australian Taxation Office") +
+  theme_economist() +
+  theme(legend.position = "bottom",
+        legend.text = element_text(angle = 45, hjust = 1, size = 8),
+        axis.text = element_blank(),
+        axis.ticks = element_blank()) 
+