R help - Oct 2004 - functions

Does anyone know of a list of functions that R already "knows?"  I
can't seem to
find this anywhere in the help documentation.  For example, I want to count the
number of occurences of a certain value in a column of a data frame: What do I
have to do to tell R to "Count?"
Thanks,
Ben Osborne

--
Botany Department
University of Vermont
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Burlington, VT 05405

benjamin.osborne at uvm.edu
phone: 802-656-0297
fax: 802-656-0440

On Sat,  9 Oct 2004 18:12:20 -0400, "Benjamin M. Osborne"
<Benjamin.Osborne at uvm.edu> wrote:
>Does anyone know of a list of functions that R already "knows?"  I
can't seem to
>find this anywhere in the help documentation.  For example, I want to count
the
>number of occurences of a certain value in a column of a data frame: What do
I
>have to do to tell R to "Count?"
There are several such lists.  The one you want is probably the one
the help system uses.  For example,

help.search('count')

lists a number of functions that count various things.  I don't think
any of them is exactly what you want, which could be accomplished in a
couple of ways:

table(x)

gives counts of all the different values in x;

length(x[x==3])

gives the count of occurences of 3 in x.

Duncan Murdoch