Dear Community,
I have a matrix with assigned colnames and rolnames as follows:
A B
NR 0.15 0,05
AL 0,05 0,05
. . .
. . .
. . .
I want to extract the names of the rows for which A>0,1 and B<0,1. In
the above example this would be observation NR only. Hence the output
should write for instance:
names:
NR
Is this possible? Thank you very much for your help.
Best Regards
extracting names from matrix according to a condition
3 messages · Peter Ehlers, Ivan
On 2011-04-25 10:58, ivan wrote:
Dear Community,
I have a matrix with assigned colnames and rolnames as follows:
A B
NR 0.15 0,05
AL 0,05 0,05
. . .
. . .
. . .
I want to extract the names of the rows for which A>0,1 and B<0,1. In
the above example this would be observation NR only. Hence the output
should write for instance:
names:
NR
Is this possible? Thank you very much for your help.
Call the matrix m. Then rownames(m[ m[, "A"] > 0.1 & m[, "B"] < 0.1, , drop=FALSE ]) should do what you want. Peter Ehlers
thank you very much. worked great for me.
On Mon, Apr 25, 2011 at 8:22 PM, Peter Ehlers <ehlers at ucalgary.ca> wrote:
On 2011-04-25 10:58, ivan wrote:
Dear Community, I have a matrix with assigned colnames and rolnames as follows: ? ? ? ? ? ? A ? ? ? ? ? ?B NR ? ?0.15 ? ? ?0,05 AL ? ? 0,05 ? ? ?0,05 . ? ? ? ? ? . ? ? ? ? ? ?. . ? ? ? ? ? . ? ? ? ? ? ?. . ? ? ? ? ? . ? ? ? ? ? ?. I want to extract the names of the rows for which A>0,1 and B<0,1. In the above example this would be observation NR only. Hence the output should write for instance: names: NR Is this possible? Thank you very much for your help.
Call the matrix m. Then ?rownames(m[ m[, "A"] > 0.1 & m[, "B"] < 0.1, , drop=FALSE ]) should do what you want. Peter Ehlers