Make a table of string frequency

I am trying to make a summary table开发者_StackOverflow中文版 of many strings. My data looks like this:

x<-c("a", "a", "b", "c", "c", "c", "d")

How would I analyse the recurrence of each string at once? Ideally to produce a table of frequency like this (I presume it would be easy to sort for decreasing frequency):

"a" 2
"b" 1
"c" 3
"d" 1

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Use this to make the frecuency table:

table(x)

To sort just use sort.

sort(table(x), decreasing = TRUE)

Hope that helps

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Similarly,

rle(sort(x))

will do the counting; you can then sort the results as desired.