Does R shiny allow to parse an XML file? - r

Question

I parse an uploaded XML file in the renderPlot function of the server.R script of R-Shiny
output$oscar <- renderPlot({
doc <- xmlParse("www/Human_body_front_and_side.svg.eps.xml")
#load the XML as a picture
body<-readPicture(saveXML(doc))
#plot it
grid.arrange(pictureGrob(body), ncol=1)
})
but I get the following error for the parsing:
XML content does not seem to be XML
I had loaded the correct libraries (shiny, XML), and checked that the uploaded xml file is fine.
The interesting point is that if, before starting the "runApp" of R-Shiny, I do in the R terminal:
doc <<- xmlParse("Human_body_front_and_side.svg.eps.xml")
no error and everything works fine. So it looks like R shiny has an issue with parsing xml. I am a newbie in R-Shiny, hence does anyone see what it needs to recognize that XML file?

Answer 1

ui.R:
library(shiny)
shinyUI(fluidPage(
titlePanel("Human body"),
sidebarLayout(
sidebarPanel(
),
mainPanel(
plotOutput("humanBody")
)
)
))
server.R
library(shiny)
library(XML)
library(grImport)
library(gridExtra)
# Define server logic to draw a histogram
shinyServer(function(input, output){
output$humanBody <- renderPlot({
doc <- readPicture("./www/Human_body_front_and_side.svg.eps.xml")
grid.arrange(pictureGrob(doc), ncol=1)
})
})
If the goal is to plot the human body from the xml, this code works. Parsing the xml is not necessary since since the readPicture() function expects an XML which your file already is. Let me know if this helps.