[R] Function as.Date leading to error implying that strptime requires 3 arguments

[Rob Balshaw]

I'm using R V 2.2.1.  When I try an example from the as.Date help page,
I get an error.

> x <- c("1jan1960", "2jan1960", "31mar1960", "30jul1960")
> z <- as.Date(x, "%d%b%Y")
Error in strptime(x, format) : 2 arguments passed to 'strptime' which
requires 3
> 

Any suggestions would be appreciated.  

Thanks,

Rob