display time series data in R
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Thanks to the Revolutions blog, several things learned here:
1. R code for heat calendar
2. generate SVG from R
3. pretty-R tool
OK. Let’s explain it by plotting the fund WASCX (IVY ASSET STRATEGY FUND CLASS C) from 2009-03-14:
1. R code for heat calendar
2. generate SVG from R
3. pretty-R tool
OK. Let’s explain it by plotting the fund WASCX (IVY ASSET STRATEGY FUND CLASS C) from 2009-03-14:
# source code of calendarHeat (by Paul Bleicher) source("http://blog.revolution-computing.com/downloads/calendarHeat.R") # fetch stock time series data from Yahoo finance stock <- "WASCX" start.date <- "2009-03-14" end.date <- Sys.Date() quote <- paste("http://ichart.finance.yahoo.com/table.csv?s=", stock, "&a=", substr(start.date,6,7), "&b=", substr(start.date, 9, 10), "&c=", substr(start.date, 1,4), "&d=", substr(end.date,6,7), "&e=", substr(end.date, 9, 10), "&f=", substr(end.date, 1,4), "&g=d&ignore=.csv", sep="") stock.data <- read.csv(quote, as.is=TRUE) # display in SVG format svg("WASCX.svg",width=14,height=7) calendarHeat(stock.data$Date, stock.data$Adj.Close, varname="WASCX Adjusted Close") dev.off()
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