R 防止应用程序渲染打印中出现错误
你好,我的闪亮应用程序有问题。应用程序工作正常,但一开始出现错误:R 防止应用程序渲染打印中出现错误,r,shiny,R,Shiny,你好,我的闪亮应用程序有问题。应用程序工作正常,但一开始出现错误: Warning: Error in xy.coords: 'x' and 'y' lengths differ Stack trace (innermost first): 102: xy.coords 101: plot.default 100: plot 99: renderPlot [C:/Users/Stuhlian/Desktop/ghj.R#29] 89: <reac
Warning: Error in xy.coords: 'x' and 'y' lengths differ
Stack trace (innermost first):
102: xy.coords
101: plot.default
100: plot
99: renderPlot [C:/Users/Stuhlian/Desktop/ghj.R#29]
89: <reactive:plotObj>
78: plotObj
77: origRenderFunc
76: output$plot1
1: runApp
为了简单起见,我制作了一个示例代码,在不使用应用程序其他内容的情况下再现错误:
ui <- fluidPage(
mainPanel(uiOutput("samplematches"),
plotOutput("plot1")
)
)
server <- function(input, output) {
re1<-data.frame(x=c(1:10),y=c(1:10))
re2 <-data.frame(x=c(1:10),y=c(1:10))
re3<-data.frame(x=c(1:10),no.matches.Sample1=c(1:10),Sample2=c(11,9,8,4,5,4,3,2,6,2))
result <- reactive({list(re,re2,re3)})
output$samplematches <- renderUI({if(length(grep("Sample", colnames(result()[[3]])))>0){sliderInput("samplematches", "Select Sample for matched masses",min=1, max=length(grep("Sample", colnames(result()[[3]]))), value=1,step=1)} else{return()}})
output$plot1 <- renderPlot({plot(result()[[3]][,1], result()[[3]][,grep("Sample", colnames(result()[[3]]))[input$samplematches]]) })
}
shinyApp(ui, server)
是否有人知道如何防止此错误,或者如果不隐藏此特殊错误的输出?非常感谢 使用shiny::validate延迟绘图计算,直到渲染完成并将值传递回服务器:
ui <- fluidPage(
mainPanel(uiOutput("samplematches"),
plotOutput("plot1")
)
)
server <- function(input, output) {
re1<-data.frame(x=c(1:10),y=c(1:10))
re2 <-data.frame(x=c(1:10),y=c(1:10))
re3<-data.frame(x=c(1:10),no.matches.Sample1=c(1:10),Sample2=c(11,9,8,4,5,4,3,2,6,2))
result <- reactive({list(re1,re2,re3)})
output$samplematches <- renderUI({
shiny::validate(
need(length(grep("Sample", colnames(result()[[3]])))>0, "A message!")
)
sliderInput("samplematches", "Select Sample for matched masses",min=1, max=length(grep("Sample", colnames(result()[[3]]))), value=1,step=1)
})
output$plot1 <- renderPlot({
shiny::validate(
need(input$samplematches, "Input a value!")
)
plot(result()[[3]][,1], result()[[3]][,grep("Sample", colnames(result()[[3]]))[input$samplematches]])
})
}
shinyApp(ui, server)