Gavin Simpson wrote:
>
>
> It says that the two arguments have different numbers of observations.
> The reason for which should now be pretty obvious as you provided a
> single Date whereas airquality has 153 observations.
>
Thanks. I did look at ?transform but I was a bit confused because this
worked
data1 <- transform(airquality,LTMDA=T)
whereas this did not
data1 <- transform(airquality,Date=as.Date("1950-01-01"))
Why does the first one work with one argument but the second one does not?
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