[英]Making a data frame column reactive in Shiny
我是新手,正在练习制作一个小型应用程序。 我试图使两列内容对用户所做的选择做出反应,但似乎无法在线找到简单的解决方案。 我希望有人可以在这里为我提供帮助。
1)我如何在下面设置我的代码,以便当用户在sliderInput中更改年份时,下面的绘图图将更新为仅显示所选年份的数据?
2)如何在下面设置我的代码,以便当用户选择某些国家/地区时,只有那些国家/地区会出现在下面的图形中?
3)如何设置sliderInput的内容格式,以便在一年中,而不是显示“ 2,012”,而是在滑块的仪表板上显示“ 2012”?
library(shiny)
library(plotly)
library(shinydashboard)
#Creating dataset
`Country Name`<- c("country 1", "country 2", "country 3",
"country 1", "country 2", "country 3",
"country 1", "country 2", "country 3",
"country 1", "country 2", "country 3")
Year <- c(2010, 2010, 2010,
2011, 2011, 2011,
2012, 2012, 2012,
2013, 2013, 2013)
GDP <- c(2345, 2465, 3985,
3453, 3748, 4847,
5674, 4957, 5763,
6475, 9387, 7564)
dataset <- data.frame(`Country Name`, Year, GDP)
#Creating shiny app
ui <- dashboardPage(
dashboardHeader(title = "Top 3 Countries"),
dashboardSidebar(
sliderInput(inputId = "Year",
label = "Choose a timeframe",
min = min(dataset$Year),
max = max(dataset$Year),
value = c(min(dataset$Year),max(dataset$Year)),
ticks = TRUE,
round = TRUE,
step = 1),
selectizeInput("countries",
"Select Country:",
choices = c("country 1",
"country 2",
"country 3"),
selected = "country 2",
multiple = TRUE
)
),
dashboardBody(plotlyOutput("top3countries")))
server <- function(input, output) {
output$top3countries <- renderPlotly({
plot_ly(dataset,
x = ~Year,
y = ~GDP,
color = ~`Country Name`,
mode = 'lines+markers')
})
}
shinyApp(ui=ui, server=server)
我们可以filter
数据集以实现此目的
library(shiny)
library(plotly)
library(shinydashboard)
library(dplyr)
#Creating dataset
`Country Name`<- c("country 1", "country 2", "country 3",
"country 1", "country 2", "country 3",
"country 1", "country 2", "country 3",
"country 1", "country 2", "country 3")
Year <- c(2010, 2010, 2010,
2011, 2011, 2011,
2012, 2012, 2012,
2013, 2013, 2013)
GDP <- c(2345, 2465, 3985,
3453, 3748, 4847,
5674, 4957, 5763,
6475, 9387, 7564)
dataset <- data.frame(`Country Name`, Year, GDP,
check.names = FALSE, stringsAsFactors = FALSE)
-ui
ui <- dashboardPage(
dashboardHeader(title = "Top 3 Countries"),
dashboardSidebar(
sliderInput(inputId = "Year",
label = "Choose a timeframe",
min = min(dataset$Year),
max = max(dataset$Year),
value = c(min(dataset$Year),max(dataset$Year)),
ticks = TRUE,
round = TRUE,
step = 1),
selectizeInput("countries",
"Select Country:",
choices = c("country 1",
"country 2",
"country 3"),
selected = "country 2",
multiple = TRUE
)
),
dashboardBody(plotlyOutput("top3countries")))
-服务器
server <- function(input, output) {
output$top3countries <- renderPlotly({
dataSub <- dataset %>%
filter(Year >= as.numeric(input$Year[1]),
Year <= as.numeric(input$Year[2]),
`Country Name` %in% input$countries)
plot_ly(dataSub,
x = ~Year,
y = ~GDP,
color = ~`Country Name`,
mode = 'lines+markers')
})
}
-跑
shinyApp(ui=ui, server=server)
-输出
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