R brush for SyntaxHighlighter

(Update, 2013-05-02 14:15 JST: This article is deprecated because I changed the template of this blog.)

I'm working on a custom brush to extend SyntaxHighlighter to support the syntax of R.
The project is on GitHub.
The brush file is SyntaxHighlighter/scripts/shBrushR.js.
Here's an example.

resultframe <- sessionframe <- temp <- bpdata[1,]
transform(resultframe, morningbedtime=c(0))
resultframe <- resultframe[0,]
for (i in 2:length(bpdata$ID)) {
  tempnext <- bpdata[i,]
  if ((abs(difftime(temp$datetime, tempnext$datetime, units="mins")) > 10) || (i == length(bpdata$ID))) {
    if (i == length(bpdata$ID)) {
      sessionframe <- merge(sessionframe, tempnext, all=T)
      sessiondatetime <- strptime(tempnext$datetime, "%Y-%m-%d %H:%M:%S")
    } else {
      sessiondatetime <- strptime(temp$datetime, "%Y-%m-%d %H:%M:%S")
    }
    sessionmax <- mean(sessionframe$max)
    sessionmin <- mean(sessionframe$min)
    sessionbpm <- mean(sessionframe$bpm)
    
    if ((morningbegin <= sessiondatetime$hour) && (sessiondatetime$hour < morningend)) {
      sessionmorningbedtime <- c(0)
    } else {
      sessionmorningbedtime <- c(1)
    }
    
    resultframe <- merge(resultframe, data.frame(datetime=sessiondatetime, max=sessionmax, min=sessionmin, bpm=sessionbpm, morningbedtime=sessionmorningbedtime), all=T)
    sessionframe <- temp <- tempnext
  } else {
    sessionframe <- merge(sessionframe, tempnext, all=T)
    temp <- tempnext
  }
}