Created
October 4, 2014 00:57
-
-
Save peterskipper/32d439feb3f167463db7 to your computer and use it in GitHub Desktop.
A simple shiny app
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
if (!exists(".inflation")) { | |
.inflation <- getSymbols('CPIAUCNS', src = 'FRED', | |
auto.assign = FALSE) | |
} | |
# adjusts yahoo finance data with the monthly consumer price index | |
# values provided by the Federal Reserve of St. Louis | |
# historical prices are returned in present values | |
adjust <- function(data) { | |
latestcpi <- last(.inflation)[[1]] | |
inf.latest <- time(last(.inflation)) | |
months <- split(data) | |
adjust_month <- function(month) { | |
date <- substr(min(time(month[1]), inf.latest), 1, 7) | |
coredata(month) * latestcpi / .inflation[date][[1]] | |
} | |
adjs <- lapply(months, adjust_month) | |
adj <- do.call("rbind", adjs) | |
axts <- xts(adj, order.by = time(data)) | |
axts[ , 5] <- Vo(data) | |
axts | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# server.R | |
library(quantmod) | |
source("helpers.R") | |
shinyServer(function(input, output) { | |
dataInput <- reactive({ | |
getSymbols(input$symb, src="yahoo", | |
from = input$dates[1], | |
to = input$dates[2], | |
auto.assign = FALSE) | |
}) | |
finalInput <- reactive({ | |
if (!input$adjust) | |
return(dataInput()) | |
adjust(dataInput()) | |
}) | |
output$plot <- renderPlot({ | |
chartSeries(finalInput(), theme = chartTheme("white"), | |
type = "line", log.scale = input$log, TA = NULL) | |
}) | |
}) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
library(shiny) | |
shinyUI(fluidPage( | |
titlePanel("stockVis"), | |
sidebarLayout( | |
sidebarPanel( | |
helpText("Select a stock to examine. | |
Information will be collected from yahoo finance."), | |
textInput("symb", "Symbol", "SPY"), | |
dateRangeInput("dates", | |
"Date range", | |
start = "2013-01-01", | |
end = as.character(Sys.Date())), | |
actionButton("get", "Get Stock"), | |
br(), | |
br(), | |
checkboxInput("log", "Plot y axis on log scale", | |
value = FALSE), | |
checkboxInput("adjust", | |
"Adjust prices for inflation", value = FALSE) | |
), | |
mainPanel(plotOutput("plot")) | |
) | |
)) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment