Created
October 11, 2014 12:28
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just learning about shiny sharing options - nothing to see here
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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 | |
} |
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# server.R | |
library(quantmod) | |
source("helpers.R") | |
shinyServer(function(input, output) { | |
dataInput <- reactive({ | |
getSymbols(input$symb, src = "yahoo", | |
from = input$dates[1], | |
to = input$dates[2], | |
auto.assign = FALSE) | |
}) | |
data <- reactive({ | |
if (input$adjust) adjust(dataInput()) else dataInput() | |
}) | |
output$plot <- renderPlot({ | |
# data <- dataInput() | |
# if (input$adjust) data <- adjust(dataInput()) | |
chartSeries(data(), theme = chartTheme("white"), | |
type = "line", log.scale = input$log, TA = NULL) | |
}) | |
}) |
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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")) | |
) | |
)) |
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