Hello,
If you have one hundred identifier names that you want to check the
result of
id %in% column
will have length 100, the same as length(id).
If you want a shorter result you can do
which(id %in% column)
This will give you only the TRUE values.
Hope this helps,
Rui Barradas
Às 05:16 de 14/08/2018, Deepa escreveu:
I have a hundred identifier names that I want to check from the second
column of a matrix with 6000 entries in the column.
Instead of using R > c("d", "v", "4", "s") %in% letters , is there an
alternative?
I have the hundred identifier names that are of my interest stored in an
array.
On Tue, Aug 14, 2018 at 9:16 AM, Boris Steipe <boris.ste...@utoronto.ca>
wrote:
Use the %in% operator:
help('%in%')
e.g.
R > c("d", "v", "4", "s") %in% letters
[1] TRUE TRUE FALSE TRUE
B.
On 2018-08-13, at 23:36, Deepa <deepamahm.i...@gmail.com> wrote:
Hi Don,
When there is a list of identifier names that I want to check, the only
way
is to loop over each entry stored in the list of identifier names or is
there is there any other shortcut?
Many thanks for the response?
On Mon, Aug 13, 2018 at 8:18 PM, MacQueen, Don <macque...@llnl.gov>
wrote:
Or to return a logical value, i.e., TRUE if the column contains the
value,
FALSE if it does not:
any( x[,2] == 'A501' )
-Don
--
Don MacQueen
Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062
Lab cell 925-724-7509
On 8/13/18, 12:09 AM, "R-help on behalf of Albrecht Kauffmann" <
r-help-boun...@r-project.org on behalf of alkau...@fastmail.fm> wrote:
Hello Deepa,
sum(x[,2] == "A501")
or
which(x[,2] == "A501")
.
Best,
Albrecht
--
Albrecht Kauffmann
alkau...@fastmail.fm
Am Mo, 13. Aug 2018, um 07:10, schrieb Deepa Maheshvare:
Hello Everyone,
I have a 1000 x 20 matrix. The second column of the matrix has the
names
of identifiers. How do I check when a certain identifier is present
in
the set of 1000 identifier names present in the second column. For
instance, let the names of identifiers be A1,A2,...A1000. I want to
check whether A501 is present .How can this be checked?
Any help will be highly appreciated.
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