r - 有没有办法更改图例上显示的值？我正在使用传单包来绘制地图
问题描述
我正在开发一个闪亮的应用程序，它绘制一个显示每个州的注册表数量的地图，但是当我运行代码时，图例会显示所有 37 个数值，我一直在寻找一种方法来对这些值进行分组，所以图例是更小，但不能让它工作。
这是我的代码：
library("dplyr")
library("mxmaps")
library("geojsonio")
library("jsonlite")
library("shiny")
library("leaflet")
library("RColorBrewer")
library("lubridate")
library("zoo")
library("stringi")
library("tidyverse")
library("janitor")
library("fuzzyjoin")
library("shinyWidgets")
reg <- read.csv("registries.csv")
# Group data and summarise
reg <- group_by(reg, year, month, id, state_name) %>%
summarise(Freq = sum(Freq)) %>%
group_by(id, state_name) %>%
mutate(Freq = cumsum(Freq))%>%
filter(id %in% 1:32) %>%
mutate(reg_date = as.Date(paste0(year, "-", month, "-01"))) %>%
mutate(mon_year = format(reg_date, "%B-%Y"))%>%
mutate(id = str_mxstate(id))
#View(reg)
choices_month <- format(seq.Date(from = as.Date("2019-05-01"), by = "month",
to = as.Date("2020-06-01")), "%B-%Y")
# Convert the topoJSON to spatial object
data(mxstate.topoJSON)
tmpdir <- tempdir()
# have to use RJSONIO or else the topojson isn't valid
write(RJSONIO::toJSON(mxstate.topoJSON), file.path(tmpdir, "state.topojson"))
# read the topojson file as an 'sf' object
states <- topojson_read(file.path(tmpdir, "state.topojson"))
# put state codes in a standard format
states$id <- str_mxstate(states$id)
# Shiny app - ui
# Define UI for application that displays registries across Mexico within a time range
ui <- bootstrapPage(
# Application title
titlePanel("Registries"),
tags$style(type = "text/css", "html, body {width:100%;height:100%}"),
leafletOutput("map", width = "100%", height = "100%"),
absolutePanel(top = 10, right = 10,
sliderTextInput(inputId = "range",
label = "Date:",
choices = choices_month
)
)
)
# Shiny app - server
server <- function(input, output, session) {
filteredData <- reactive({
print(input$range[1])
states <- left_join(states, subset(reg, mon_year == input$range[1]),
by = "id")
states
})
colorpal <- reactive({
colorFactor(palette = c("#E6FAD7", "#AED68F", "#8ABA64", "#619A34", "#406C1F", "#203E09"), reg$Freq)
})
output$map <- renderLeaflet({
states <- left_join(states, subset(reg, year == 2019), by = "id")
pal <- colorpal()
leaflet(states) %>% addTiles() %>%
setView(-102, 23.8, 5)%>%
addLegend(position = "bottomright",
pal = pal,
values = ~reg$Freq,
title = "Number of<br/>registries per<br/>state") %>%
addTiles()
})
observe({
pal <- colorpal()
leafletProxy("map", data = filteredData()) %>%
clearShapes() %>%
addPolygons(stroke = TRUE, weight = 1, color = "#000000",
fillOpacity = 0.8, smoothFactor = 0.5,
fillColor = ~pal(Freq),
popup = ~ sprintf("Estado: %s<br/>Registros: %s",
stri_trans_totitle(state_name),
round(Freq, 1)))
})
}
shinyApp(ui, server)
我尝试将图例值手动添加为向量，但它不起作用。还尝试更改垃圾箱的数量，但也没有成功。
您可以从这里下载 CSV 文件：https ://github.com/avleon/reg_data.git
如果有人可以帮助我解决这个问题，我将不胜感激。谢谢！