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#' @demoTitle baseball-bubble
#'
#' Demo bubble charts
#'
#' To install and use baseball demo dataset in Aster:
#'
#' 1. download baseball.zip from
#' https://bitbucket.org/grigory/toaster/downloads/baseball.zip
#' 2. run script to create data set in Aster
#' sh load_baseball_data.sh -d mydbname -U username -w mypassword
#' 3. create Aster ODBC DSN on your desktop
#' see https://bitbucket.org/grigory/toaster/wiki/Home#markdown-header-odbc-driver-and-dns
library(toaster)
library(ggplot2)
## utility input function
readlineDef <- function(prompt, default) {
if (!is.null(prompt))
prompt = paste0(prompt, "[", default, "]: ")
else
prompt = paste0(prompt, ": ")
result = readline(prompt)
if (result == "")
return (default)
else
return (result)
}
## utility connection function
connectWithDSNToAster <- function(dsn=NULL) {
dsn = readlineDef("Enter Aster ODBC DSN: ", dsn)
tryCatch(close(conn), error=function(err) {NULL})
conn = tryCatch({
conn = odbcConnect(dsn)
odbcGetInfo(conn)
return (conn)
}, error=function(err) {
stop(paste("Can't connect to Aster - check DSN '", dsn, "'"))
})
}
## connect to Aster first
conn = connectWithDSNToAster()
## must be connected to baseball dataset
if(!all(isTable(conn, c('teams_enh')))) {
stop("Must connect to baseball dataset and table 'teams_enh' must exist.")
}
# Bubble chart example
bubble = computeHeatmap(conn, 'teams_enh', 'franchid', 'decadeid',
aggregates=c("SUM(BA*AB)/SUM(AB)ba",
"SUM(IPOuts*ERA)/SUM(IPOuts) era",
"ROUND(AVG(8-rank)) rank",
"MIN(lgid) lgid"),
where="yearid between 1970 and 2009")
createBubblechart(bubble, "ba", "era", "rank", label="franchid", fill="franchid",
facet=c("decadeid","lgid"), #ncol=1,
scaleSize = FALSE, shapeSizeRange=c(1,15), shapeMaxSize = 15,
title="Team Ranks by BA and ERA",
labelSize = 5, labelColour = "black", labelVJust = 1,
legendPosition="none", themeExtra = guides(fill = "legend", size = "legend"))
createBubblechart(bubble, "ba", "era", "rank", label="franchid", fill="franchid",
facet=c("lgid", "decadeid"), ncol=1, shapeSizeRange=c(1,20),
title="Team Ranks by BA and ERA",
labelSize = 5, labelColour = "black", labelVJust = 1,
legendPosition="none", themeExtra = guides(fill = "legend", size = "legend"))
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