Dash for R Stock Ticker Sample App

app.R

library(dash)
library(dashHtmlComponents)
library(dashCoreComponents)
library(quantmod)

getSymbols(c("Coke" = "COKE", "Tesla" = "TSLA", "Apple" = "AAPL"))

app <- Dash$new()

app$layout(
    htmlDiv(
        list(
            dccDropdown(
                id = "stock-dropdown",
                options = list(
                    list(label = "Coke", value = "COKE"),
                    list(label = "Tesla", value = "TSLA"),
                    list(label = "Apple", value = "AAPL")
                    ),
                value = "COKE"
            ),
            dccGraph(id = "stock-graph")
        )
    )
)

app$callback(output("stock-graph", "figure"),
             list(input("stock-dropdown", "value")),
             function(ticker) {
               d <- switch(ticker, AAPL = AAPL, TSLA = TSLA, COKE = COKE)
               list(
                 data = list(
                   list(x = index(d), y = as.numeric(d[, 4]))
                   ),
                 layout = list(title = ticker)
               )
              }
)

app$run_server()

Python version: https://gist.github.com/rpkyle/b69a4c70bb35b53c1902587a7c3e52dc
Julia version: https://gist.github.com/rpkyle/cedf2b34043362d303ed677f139c8375
F# version: https://gist.github.com/kMutagene/b1af6e4d388dbd04a47a1014ad450593

The ticker symbol for Coke is "KO" and not "COKE"

The ticker symbol for Coke is "KO" and not "COKE"

@ashgreat I think it's more accurate to say that "KO" is the NYSE symbol for the Coca-Cola Company, and "COKE" is the NASDAQ symbol for Coca-Cola Bottling Consolidated. "TSLA" and "AAPL" are both NASDAQ symbols, and that's why "COKE" is used here instead.

Thanks for the clarification. I still think this is a strange choice of a company given that it's just an independent bottler (mkt value $3 billion) of the Coca Cola Company (mkt value $256 billion). Anyway it's a trivial thing and I don't want to take away from the actual objective of the application.