我有一个Shiny应用程序,它允许通过downloadHandler()创建PDF报告。我的.Rmd文件中包含一个外部图像文件。当我单独编织.Rmd文件时,将显示此图像。当我通过Shiny应用程序(调用.Rmd文件)生成PDF报告时,找不到图像并且无法生成报告。我在做什么错了?
Shiny应用程序的相关部分:
var dateComponent = DateComponents()
dateComponent.hour = 7
dateComponent.minute = 0
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponent, repeats: true)
这是我的.Rmd文件的相关部分:
output$report <- downloadHandler(
filename = "report.pdf",
content = function(file) {
# Copy the report file to a temporary directory before processing it, in
# case we don't have write permissions to the current working dir (which
# can happen when deployed).
tempReport <- file.path(tempdir(), "report.Rmd")
file.copy("report.Rmd", tempReport, overwrite = TRUE)
abs_kontr <- "test variable"
# Set up parameters to pass to Rmd document
params <- list(abs_kontr = abs_kontr)
# Knit the document, passing in the `params` list, and eval it in a
# child of the global environment (this isolates the code in the document
# from the code in this app).
rmarkdown::render(tempReport, output_file = file,
params = params,
envir = new.env(parent = globalenv())
)
}
)
“ knitr :: include_graphics(” www / logo.jpg“)”是直接编译文档时有效的部分,但是当通过Shiny应用程序调用pdf创建时无效。当我想通过Shiny应用程序下载报告时,需要花费几秒钟的时间才能重定向到“找不到文件”页面,指示代码已崩溃。
答案 0 :(得分:0)
感谢Using image in r markdown report downloaded from Shiny app,我自己找到了解决方案:
您还必须将所有包含的外部映像也复制到临时路径,以便找到它们!只需将以下内容添加到您的app.R:
tempReport2 <- file.path(tempdir(), "logo.jpg")
file.copy("logo.jpg", tempReport2, overwrite = TRUE)