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
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