::p_load(tidyverse, tmap, sf, sfdep) pacman
In-class Exercise 5
#Installing and Loading Packages
1 Importing Data
<- st_read(dsn="data",
studyArea layer="study_area") %>%
st_transform(crs=3829)
Reading layer `study_area' from data source
`C:\gailteh\IS415-GAA\In-class_Ex\In-class_Ex05\data' using driver `ESRI Shapefile'
Simple feature collection with 7 features and 7 fields
Geometry type: POLYGON
Dimension: XY
Bounding box: xmin: 121.4836 ymin: 25.00776 xmax: 121.592 ymax: 25.09288
Geodetic CRS: TWD97
<- st_read(dsn="data",
stores layer="stores") %>%
st_transform(crs=3829)
Reading layer `stores' from data source
`C:\gailteh\IS415-GAA\In-class_Ex\In-class_Ex05\data' using driver `ESRI Shapefile'
Simple feature collection with 1409 features and 4 fields
Geometry type: POINT
Dimension: XY
Bounding box: xmin: 121.4902 ymin: 25.01257 xmax: 121.5874 ymax: 25.08557
Geodetic CRS: TWD97
##Visualising sf layers
tmap_mode("view")
tm_shape(studyArea) +
tm_polygons() +
tm_shape(stores) +
tm_dots(col = "Name",
size = 0.01,
border.col = "black",
border.lwd = 0.5) +
tm_view(set.zoom.limits = c(12,16))
tmap_mode("plot")
2 Local Colocation Quotients (LCLQ)
<- include_self(
nb st_knn(st_geometry(stores), 6))
<- st_kernel_weights(nb,
wt
stores,"gaussian")
<- stores %>%
FamilyMart filter(Name == "Family Mart")
<- FamilyMart$Name A
<- stores %>%
SevenEleven filter(Name == "7-Eleven")
<- SevenEleven$Name B
<- local_colocation(A, B, nb, wt, 49) LCLQ
<- cbind(stores, LCLQ) LCLQ_Stores
tmap_mode("view")
tm_shape(studyArea) +
tm_polygons() +
tm_shape(LCLQ_Stores)+
tm_dots(col = "X7.Eleven",
size = 0.01,
border.col = "black",
border.lwd = 0.5) +
tm_view(set.zoom.limits = c(12, 16))