Question

我有在shinyapps.io中部署的应用程序。应用程序的功能之一是以pdf格式生成分析结果的报告。

除了生成报告外，该应用程序的所有其他功能都可以正常工作单击应用程序中的“下载报告”时，它会显示已断开与服务器的连接。当报告通过本地IDE运行并从外部浏览器打开时，将根据需要生成报告。

Reports.Rmd

---
title: " Analysis Report"
output: pdf_document
header-includes: \usepackage{fancyhdr}

---
  \addtolength{\headheight}{1.0cm} 
\pagestyle{fancyplain} 
\rhead{\includegraphics[height=1.2cm]{1.png}} 
\renewcommand{\headrulewidth}{0pt} 


##Engine Details

Selected Class Type: `r input$c_type`  
Selected Room :`r input$rm_num`  


##Analysis Result

Percentage of data points spread: `r (nrow(subtable())/nrow(nonzero()))* 
 100`  
Average Marks: `r mean(subtable()$Marks)`  


##Trend Analysis Graph for the selected data 
```{r, echo=FALSE}
library(gridExtra)
par(mfrow = c(2,2))
          PredictedCN = feforplot()
          Subt = subtable()$Sbt
          plot(Subt,type = "o",lwd=2,col = "red", xlab = "A", ylab = "B",
             main = "A v/s B",xlim=c(100,1500),ylim=c(0,10))

          lines (PredictedCN, type = "o", col = "blue")

          VS = subtable()$V.S
          plot(VS,type = "o",col = "red", xlab = "VS", ylab = "Analysis",
             main = "Analytical R",xlim=c(0,100),ylim=c(0,10))


```

##Input File  Details

Input file name: `r filename()`  
Input file size in bytes: `r filesize()`   
Total number of rows: `r nrow(dataframe())`    
Total number of columns: `r ncol(dataframe())`  
Report generated date: `r date()`

Server.R 这是服务器脚本中下载处理程序的代码段

output$reportpdf <- downloadHandler(
filename = function() {
  paste('my-report', sep = '.', 'pdf')
},


content = function(file) {
  src <- normalizePath('report.Rmd')

  # temporarily switch to the temp dir, in case you do not have write
  # permission to the current working directory
  owd <- setwd(tempdir())
  on.exit(setwd(owd))
  file.copy(src, 'report.Rmd', overwrite = TRUE)

  library(rmarkdown)
  out <- render('report.Rmd', pdf_document())
  file.rename(out, file)

}
 )

Shiny App.io Logs

processing file: reports.Rmd
inline  R code fragments
|      | 0%|20%|40%
label: unnamed-chunk-1 (with options)
List of 1
$echo: logi FALSE

在Shinyapps.io中部署R降级失败

0 个答案: