在RStudio中,如果我逐行使用Ctrl + Enter运行以下Shiny代码,则它们可以正常工作。但是,如果我使用“运行应用程序”按钮运行整个代码,则会产生此错误:
ts(x)中的错误:“ ts”对象必须具有一个或多个观察结果
我认为这是由于“ lambda”参数引起的,但我不知道为什么。任何帮助表示赞赏。
“ data.csv”的链接为https://www.dropbox.com/s/p1bhacdg8j1qx42/data.csv?dl=0
===================================
library(shiny)
library(shinydashboard)
library(plotly)
library(forecast)
df <- read.csv("data.csv")
demand <- ts(df$demand, start = c(1995, 1), frequency = 12)
lbd <- BoxCox.lambda(demand, lower=-5, upper=5)
m <- ar(BoxCox(demand,lambda=lbd))
fit_BC <- forecast(m, h=12, lambda=lbd)
ui <- dashboardPage(
dashboardHeader(title = "Plot"),
dashboardSidebar(disable = TRUE),
dashboardBody(fluidRow(column(width = 12, box(plotlyOutput("forecast_plots"),width = NULL))))
)
server <- function(input, output) {
output$forecast_plots <- renderPlotly({
autoplot(fit_BC)
})
}
shinyApp(ui, server)
=================================
答案 0 :(得分:0)
autoplot()返回ggplot对象。但是您的输出$ forecast_plots需要plotly对象(带有plotlyOutput()函数)。
工作代码如下:
ui <- dashboardPage(
dashboardHeader(title = "Plot"),
dashboardSidebar(disable = TRUE),
dashboardBody(fluidRow(column(width = 12, box(plotOutput("forecast_plots"),width = NULL))))
)
server <- function(input, output) {
output$forecast_plots <- renderPlot({
autoplot(fit_BC)
})
}
可以使用ggplotly函数轻松地转换ggplot对象,但是不幸的是,转换后的plotly自动绘图图丢失了预测区域。您可以像这样验证它:
ui <- dashboardPage(
dashboardHeader(title = "Plot"),
dashboardSidebar(disable = TRUE),
dashboardBody(fluidRow(column(width = 12, box(plotlyOutput("forecast_plots"),width = NULL))))
)
server <- function(input, output) {
output$forecast_plots <- renderPlotly({
ggplotly(autoplot(fit_BC))
})
}
我找到了自动绘图库。https://terrytangyuan.github.io/2018/02/12/autoplotly-intro/
autoplotly()函数可以将自动绘图对象转换为大致正确的plotly对象。
library(shiny)
library(shinydashboard)
library(plotly)
library(forecast)
library(autoplotly)
df <- read.csv("c:/Users/010170283/Downloads/data.csv")
demand <- ts(df$demand, start = c(1995, 1), frequency = 12)
lbd <- BoxCox.lambda(demand, lower=-5, upper=5)
m <- ar(BoxCox(demand,lambda=lbd))
fit_BC <- forecast(m, h=12, lambda=lbd)
ui <- dashboardPage(
dashboardHeader(title = "Plot"),
dashboardSidebar(disable = TRUE),
dashboardBody(fluidRow(column(width = 12, box(plotlyOutput("forecast_plots"),width = NULL))))
)
server <- function(input, output) {
output$forecast_plots <- renderPlotly({
autoplotly(autoplot(fit_BC))
})
}
shinyApp(ui, server)
可以看到预测区域,并通过鼠标悬停事件显示高/低80%的边缘值。