maximum of identical elements in a vector
On Sun, 2008-03-30 at 17:35 -0400, Daniel Malter wrote:
Hi,
the problem I have is seemingly very simple, but not simple enough for me to
figure out. I just want to find the most (or least) frequent element in the
vector.
a=c("Alice","Alice","Alice","Alice","Bob","Bob")
unique(a)
length(which(a=="Alice"))
a <- c("Alice","Alice","Alice","Alice","Bob","Bob")
tab <- table(a)
tab
a
Alice Bob
4 2
which.max(tab)
Alice
1
tab[which.max(tab)]
Alice
4
HTH
G
unique(a) shows me that the elements in my vector are "Alice" and "Bob". The latter expression gives 4 as the frequency of "Alice" in vector a. To find the maximum frequency of the unique elements, however, it assumes that I know that "Alice" is the most (or least) frequent element. Therefore, how can find that "Alice" is the most frequent element in this vector? I assume there is an easier way than computationally intensive loops (for long vectors). Cheers, Daniel ------------------------- cuncta stricte discussurus
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