Here is a sample Shiny application that shows the available encodings:
#
# This is a Shiny web application. You can run the application by clicking
# the 'Run App' button above.
#
# Find out more about building applications with Shiny here:
#
# http://shiny.rstudio.com/
#
library(shiny)
ui <- fluidPage(
# Application title
titlePanel("iconvlist"),
mainPanel(tableOutput("list"))
)
server <- function(input, output) {
output$list <- renderTable(iconvlist())
}
# Run the application
shinyApp(ui = ui, server = server)
It doesn't appear that IBM037 is available.