我一直在参考以下帖子,这对帮助我了解Rshiny功能非常有帮助:
How can I update plot from rhandsontable with uploaded data, without clicking into the table first?
在掌握“观察”的概念时,我仍然遇到一些麻烦,因此这可能是这里的问题。我想上传2个csv,其中1个是静态的(将其保存在单独的选项卡中),而1个是可编辑的(点击按钮后,相应的绘图中会反映出编辑内容)。我的最终目标是能够在相同的轴上一起绘制这些数据集,但是现在,我很难获得表格显示,这使我认为它没有正确上传。我正在使用以下代码:
library(shiny)
library(rhandsontable)
#sample data
year <- substr(Sys.Date(),1,4)
empty_dat=as.data.frame(matrix(1,nrow = 3,ncol = 4,dimnames = list(c("Cat A", "Cat B", "Cat C"),
c(paste("May",year),paste("June",year),paste("July",year),
paste("August",year)))))
ui = fluidPage(sidebarLayout(
sidebarPanel(
#static data input
fileInput('file1_new', 'Choose CSV File'),
#reactive data inut
fileInput('file1', 'Choose CSV File'),
#display reactive data
rHandsontableOutput('contents'),
actionButton("go", "Plot Update"),
width=7
),
mainPanel(
tabsetPanel(
#plot reactive data first tab
tabPanel("Plot", plotOutput("plot1")),
#table static data second tab
tabPanel("Table", tableOutput("table"))
)
)
))
server = function(input, output) {
#static input
output$table <- renderTable({
inFile <- input$file_new
if (is.null(inFile))
return(NULL)
read.csv(inFile$datapath, header = input$header,
sep = input$sep, quote = input$quote)
})
indat <- reactiveValues(data=empty_dat)
#reactive input
observe({
inFile = input$file1
if (is.null(inFile))
return(NULL)
data1 = read.csv(inFile$datapath)
indat$data <- data1
})
observe({
if(!is.null(input$contents))
indat$data <- hot_to_r(input$contents)
})
output$contents <- renderRHandsontable({
rhandsontable(indat$data)
})
#***example uses only one column-why I attempt multiple columns (indat$data[,1:4],indat$data[],indat$data) I get an error
#update data when user hits button
test <- eventReactive(input$go, {
return(indat$data[,3])
})
output$plot1 <- renderPlot({
#plot updated data
plot(test(),type = "l")
})
}
shinyApp(ui, server)
任何帮助将不胜感激。
答案 0 :(得分:1)
我对代码做了很少的更改,现在第二个选项卡显示了静态表。 我不确定这是否是您想要的,但是这是代码。我所做的更改位于代码下方。
library(shiny)
library(rhandsontable)
#sample data
year <- substr(Sys.Date(),1,4)
empty_dat=as.data.frame(matrix(1,nrow = 3,ncol = 4,dimnames = list(c("Cat A", "Cat B", "Cat C"),
c(paste("May",year),paste("June",year),paste("July",year),
paste("August",year)))))
ui = fluidPage(sidebarLayout(
sidebarPanel(
#static data input
fileInput('file1_new', 'Choose CSV File'),
#reactive data inut
fileInput('file1', 'Choose CSV File'),
#display reactive data
rHandsontableOutput('contents'),
actionButton("go", "Plot Update"),
width=7
),
mainPanel(
tabsetPanel(
#plot reactive data first tab
tabPanel("Plot", plotOutput("plot1")),
#table static data second tab
tabPanel("Table", tableOutput("table"))
)
)
))
server = function(input, output) {
#static input
output$table <- renderTable({
inFile <- input$file1_new
if (is.null(inFile))
{return(mtcars)}
else{
read.csv(inFile$datapath)}
})
indat <- reactiveValues(data=empty_dat)
#reactive input
observe({
inFile = input$file1
if (is.null(inFile))
return(NULL)
data1 = read.csv(inFile$datapath)
indat$data <- data1
})
observe({
if(!is.null(input$contents))
indat$data <- hot_to_r(input$contents)
})
output$contents <- renderRHandsontable({
rhandsontable(indat$data)
})
#***example uses only one column-why I attempt multiple columns (indat$data[,1:4],indat$data[],indat$data) I get an error
#update data when user hits button
test <- eventReactive(input$go, {
return(indat$data[,3])
})
output$plot1 <- renderPlot({
#plot updated data
plot(test(),type = "l")
})
}
shinyApp(ui, server)
因此,在执行renderTable的部分中,变量名略有错误:p,而在read.csv中,参数过多。
output$table <- renderTable({
inFile <- input$file1_new
if (is.null(inFile))
{return(mtcars)}
else{
read.csv(inFile$datapath)}
})
请让我知道这是否对您有用...干杯!