Sverre,
Try this:
my.list <- split(names(my.vector), my.vector)
my.list$base
my.list$recommended
Jean
`·.,, ><(((º> `·.,, ><(((º> `·.,, ><(((º>
Jean V. Adams
Statistician
U.S. Geological Survey
Great Lakes Science Center
223 East Steinfest Road
Antigo, WI 54409 USA
From:
Sverre Stausland <john...@fas.harvard.edu>
To:
r-help@r-project.org
Date:
08/02/2011 01:24 PM
Subject:
[R] Extract names from vector according to their values
Sent by:
r-help-boun...@r-project.org
Dear helpers,
I can create a vector with the priority of the packages that came with
R, like this:
> installed.packages()[,"Priority"]->my.vector
> my.vector
base boot class cluster codetools
"base" "recommended" "recommended" "recommended" "recommended"
compiler datasets foreign graphics grDevices
"base" "base" "recommended" "base" "base"
grid KernSmooth lattice MASS Matrix
"base" "recommended" "recommended" "recommended" "recommended"
methods mgcv nlme nnet rpart
"base" "recommended" "recommended" "recommended" "recommended"
spatial splines stats stats4 survival
"recommended" "base" "base" "base" "recommended"
tcltk tools utils
"base" "base" "base"
How can I extract the names from this vector according to their
priority? I.e. I want to create a vector from this with the names of
the "base" packages, and another vector with the names of the
"recommended" packages.
Thank you
Sverre
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and provide commented, minimal, self-contained, reproducible code.
