Created
June 29, 2021 14:35
-
-
Save charliejhadley/3e5e9491224b40e8e9a0b2bc22594e1c to your computer and use it in GitHub Desktop.
Demonstration of plotOutput("gg_map", click = "ggmap_click") functionality for geom_sf()
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
library("shiny") | |
library("tidyverse") | |
library("rnaturalearthdata") | |
library("sf") | |
# Using Africa instead of whole world as countries110 contains | |
# 3 invalid geometries. Also, too many examples use the USA everytime | |
africa_sf <- countries110 %>% | |
st_as_sf() %>% | |
st_transform(4326) %>% | |
filter(continent == "Africa") | |
ui <- fluidPage( | |
h1("Plot brush with geom_sf"), | |
wellPanel("Click in a country to populate the table below the chart"), | |
plotOutput( | |
"gg_world_map", | |
click = "gg_world_map_click", | |
height = "600px", | |
width = "100%" | |
), | |
wellPanel("The table below provides detail on the selected country"), | |
tableOutput("table_click") | |
) | |
server <- function(input, output, session) { | |
output$gg_world_map <- renderPlot({ | |
ggplot() + | |
geom_sf(data = africa_sf) | |
}, res = 96) | |
output$table_click <- renderTable({ | |
if (is.null(input$gg_world_map_click)) { | |
return() | |
} | |
selected_point <- tibble(long = input$gg_world_map_click$x, | |
lat = input$gg_world_map_click$y) %>% | |
st_as_sf(coords = c("long", "lat"), | |
crs = 4326) | |
st_intersection(selected_point, countries_sf) %>% | |
st_drop_geometry() %>% | |
select(name, pop_est, gdp_md_est) | |
}) | |
} | |
shinyApp(ui, server) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment