Lab cell 925-724-7509
From: Deepa
Date: Monday, August 13, 2018 at 8:36 PM
To: "MacQueen, Don" , array R-help
Subject: Re: [R] searching for a specific row name in R
Hi Don,
When there is a list of identifier names that I want to check, the only way is
to loop over each entry stor
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
These seem to be basic R questions. You should spend time with an R
tutorial or two for this sort of thing. This list is here to help, but you
also need to do homework on your own if you have not already done so.
Cheers,
Bert
Bert Gunter
"The trouble with having an open mind is that people
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
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 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
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 wrote:
> Or to return a
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
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
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
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