Shiny 如何计算从滑块接收值的数学表达式
我是新来的，我正在努力学习。我的问题是，我想通过给滑块一个值来计算一个数学表达式，最后显示结果。直到现在，我已经做了以下代码，但它是错误的。你能给我引路吗 提前谢谢Shiny 如何计算从滑块接收值的数学表达式,shiny,shinyapps,Shiny,Shinyapps,我是新来的，我正在努力学习。我的问题是，我想通过给滑块一个值来计算一个数学表达式，最后显示结果。直到现在，我已经做了以下代码，但它是错误的。你能给我引路吗 提前谢谢 library(shiny) library(shinythemes) # Define UI for slider demo app ---- ui <- fluidPage( #Navbar structure for UI navbarPage("SAR Model", theme = sh
library(shiny)
library(shinythemes)
# Define UI for slider demo app ----
ui <- fluidPage(
#Navbar structure for UI
navbarPage("SAR Model", theme = shinytheme("united"),
tabPanel("Toblers Function", fluid = TRUE),
# App title ----
titlePanel("Toblers Fuction"),
# Sidebar layout with input and output definitions ----
sidebarLayout(
# Sidebar to demonstrate various slider options ----
sidebarPanel(
# Input: Slope interval with step value ----
sliderInput("slope", "Slope:",
min = -0.60, max = 0.50,
value = 0.0, step = 0.01),
),
# Main panel for displaying outputs ----
mainPanel(
# Output: Table summarizing the values entered ----
tableOutput("values")
)
)
)
)
server <- function(input, output, session) {
# Reactive expression to create data frame off input value ----
sliderValues <- reactive({
data.frame(
Name = c("Slope"),
Value = as.character(c(input$slope)),
stringsAsFactors = FALSE)
})
Value$toblers <- 6*exp(-3.5*input$slope)
# Show the values in an HTML table ----
output$values <- renderTable({
sliderValues()
})
output$tobler <-renderText({value$toblers})
}
shinyApp(ui = ui, server = server)
库（闪亮）
图书馆（shinythemes）
#定义滑块演示应用程序的UI----
ui在不允许的被动上下文之外使用输入$slope
。为toblers的计算定义一个反应式，然后显示如下：
toblers <- reactive({
6*exp(-3.5*input$slope)
})
output$tobler <-renderText({toblers()})
toblers好的，我做了一些更改，但没有显示结果。
这是密码
library(shiny)
library(shinythemes)
# Define UI for slider demo app ----
ui <- fluidPage(
#Navbar structure for UI
navbarPage("SAR Model", theme = shinytheme("united"),
tabPanel("Toblers Function", fluid = TRUE),
# App title ----
titlePanel("Toblers Fuction"),
# Sidebar layout with input and output definitions ----
sidebarLayout(
# Sidebar to demonstrate various slider options ----
sidebarPanel(
# Input: Slope interval with step value ----
sliderInput("slope", "Slope:",
min = -0.60, max = 0.50,
value = 0.0, step = 0.01)),
# Main panel for displaying outputs ----
mainPanel(
# Output: Table summarizing the values entered ----
tableOutput("values"),
)
)
)
)
server <- function(input, output, session) {
# Reactive expression to create data frame off input value ----
sliderValues <- reactive({
data.frame(
Name = c("Slope"),
Value = as.character(c(input$slope)),
stringsAsFactors = TRUE)
})
# Show the values in an HTML table ----
output$values <- renderTable({
sliderValues()
})
output$slope <- renderText({
paste0("The speed is ", 6*exp(-3.5*input$slope),"Km/h")
})
}
shinyApp(ui = ui, server = server)
library(shiny)
library(shinythemes)
# Define UI for slider demo app ----
ui <- fluidPage(
#Navbar structure for UI
navbarPage("SAR Model", theme = shinytheme("united"),
tabPanel("Toblers Function", fluid = TRUE),
# App title ----
titlePanel("Toblers Fuction"),
# Sidebar layout with input and output definitions ----
sidebarLayout(
# Sidebar to demonstrate various slider options ----
sidebarPanel(
# Input: Slope interval with step value ----
sliderInput("slope", "Slope:",
min = -0.60, max = 0.50,
value = 0.0, step = 0.01)),
# Main panel for displaying outputs ----
mainPanel(
# Output: Table summarizing the values entered ----
tableOutput("Values"),
tableOutput("slope")
)
)
)
)
server <- function(input, output, session) {
# Reactive expression to create data frame off input value ----
sliderValues <- reactive({
data.frame(
Name = c("Slope"),
Value = as.character(c(input$slope)),
stringsAsFactors = TRUE)
})
# Show the values in an HTML table ----
output$values <- renderTable({
sliderValues()
})
output$slope <- renderText({
paste0("The speed is ", 6*exp(-3.5*abs(input$slope+0.05)),"Km/h")
})
}
shinyApp(ui = ui, server = server)
库（闪亮）
图书馆（shinythemes）
#定义滑块演示应用程序的UI----
ui我找到了一个解决方案，但不知道该表是否显示了来自滑块的值。
有什么意见吗？为什么？
这是密码
library(shiny)
library(shinythemes)
# Define UI for slider demo app ----
ui <- fluidPage(
#Navbar structure for UI
navbarPage("SAR Model", theme = shinytheme("united"),
tabPanel("Toblers Function", fluid = TRUE),
# App title ----
titlePanel("Toblers Fuction"),
# Sidebar layout with input and output definitions ----
sidebarLayout(
# Sidebar to demonstrate various slider options ----
sidebarPanel(
# Input: Slope interval with step value ----
sliderInput("slope", "Slope:",
min = -0.60, max = 0.50,
value = 0.0, step = 0.01)),
# Main panel for displaying outputs ----
mainPanel(
# Output: Table summarizing the values entered ----
tableOutput("values"),
)
)
)
)
server <- function(input, output, session) {
# Reactive expression to create data frame off input value ----
sliderValues <- reactive({
data.frame(
Name = c("Slope"),
Value = as.character(c(input$slope)),
stringsAsFactors = TRUE)
})
# Show the values in an HTML table ----
output$values <- renderTable({
sliderValues()
})
output$slope <- renderText({
paste0("The speed is ", 6*exp(-3.5*input$slope),"Km/h")
})
}
shinyApp(ui = ui, server = server)
library(shiny)
library(shinythemes)
# Define UI for slider demo app ----
ui <- fluidPage(
#Navbar structure for UI
navbarPage("SAR Model", theme = shinytheme("united"),
tabPanel("Toblers Function", fluid = TRUE),
# App title ----
titlePanel("Toblers Fuction"),
# Sidebar layout with input and output definitions ----
sidebarLayout(
# Sidebar to demonstrate various slider options ----
sidebarPanel(
# Input: Slope interval with step value ----
sliderInput("slope", "Slope:",
min = -0.60, max = 0.50,
value = 0.0, step = 0.01)),
# Main panel for displaying outputs ----
mainPanel(
# Output: Table summarizing the values entered ----
tableOutput("Values"),
tableOutput("slope")
)
)
)
)
server <- function(input, output, session) {
# Reactive expression to create data frame off input value ----
sliderValues <- reactive({
data.frame(
Name = c("Slope"),
Value = as.character(c(input$slope)),
stringsAsFactors = TRUE)
})
# Show the values in an HTML table ----
output$values <- renderTable({
sliderValues()
})
output$slope <- renderText({
paste0("The speed is ", 6*exp(-3.5*abs(input$slope+0.05)),"Km/h")
})
}
shinyApp(ui = ui, server = server)
库（闪亮）
图书馆（shinythemes）
#定义滑块演示应用程序的UI----
用户界面