R annoyances

R seems to be, hmm, quirky, from what I've seen of it so far... For instance, ddply has different behavior using the American vs. British spellings of "summarize". Seriously?!

> g <- ddply(m, c("QGroup","Income.Group"), summarize, All = length(CountryCode))
Error: argument "by" is missing, with no default

> g <- ddply(m, c("QGroup","Income.Group"), summarise, All = length(CountryCode))

Yes, that's right - "summarise" works fine but "summarize" apparently takes different arguments.