simple subset question
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