您可以使用内容 ID(“cid”)附加图像并在电子邮件正文中引用它:
library(ggplot2)
p <- ggplot(mtcars, aes(wt, mpg)) + geom_point()
ggsave(tf<-tempfile(fileext = ".png"), p, dpi = 100, width = 5, height = 5)
library(RDCOMClient)
OutApp <- COMCreate("Outlook.Application")
outMail = OutApp$CreateItem(0)
attach <- outMail[["Attachments"]]$Add(tf)
invisible(attach$PropertyAccessor()$SetProperty(
"http://schemas.microsoft.com/mapi/proptag/0x370E001E",
"image/png"
))
invisible(attach$PropertyAccessor()$SetProperty(
"http://schemas.microsoft.com/mapi/proptag/0x3712001E",
cid <- "myggplotimg"
))
outMail[["To"]] = "johndoe@example.com"
outMail[["Subject"]] = "ggplot image"
outMail[["HTMLbody"]] <- sprintf('<p>Here is your image:<br><img src="cid:%s"></p>', cid)
invisible(outMail$Save())
rm(outMail, attach, OutApp)