[R] simple subset question

[Gerrit Eichner]

Hi, Felipe,

two typos? See below!

On Sun, 2 Dec 2012, Felipe Carrillo wrote:

>  Hi,
> Consider the small dataset below, I want to subset by two variables in
> one line but it wont work...it works though if I subset separately. I have
> to be missing something obvious that I did not realize before while using subset..
>
> fish <- structure(list(IDWeek = c(27L, 28L, 29L, 30L, 31L, 32L, 33L,

> ... [snip]

> 2011L)), .Names = c("IDWeek", "Total", "Fry", "Smolt", "FryEq",
> "Year"), row.names = c(NA, 52L), class = "data.frame")
> fish
> #  Subset to get the max Total for 2012
>   x <- subset(winter,Year==2012 & Total==max(Total));b  # How come one line doesn't work?

Don't you want *fish* instead of *winter* and *x* instead of *b*, as in

x <- subset(  fish    ,Year==2012 & Total==max(Total));    x

?

  Hth  --  Gerrit

>  
>   # It works if I subset the year first and then get the Total max from it
>   xx <- subset(winter,Year==2012) 
> xxx <- subset(xx,Total==max(Total));xxx  
> xxx
>