[R] package dependency tree
Peter Dalgaard
P.Dalgaard at biostat.ku.dk
Tue Jan 2 19:07:07 CET 2007
roger koenker wrote:
> Is there a painless way to find the names of all packages on CRAN
> that "Depend" on a specified package?
>
Depends on how accurately you need them. These *probably* depend on "boot"
> x <- available.packages()
> rownames(x)[grep("boot",x[,"Depends"])]
[1] "circular" "cramer" "DCluster" "equivalence" "np"
[6] "pastecs" "relaimpo" "sensitivity" "simpleboot" "spdep"
[11] "survrec" "titan" "verification" "Zelig"
This allows visual inspection of the Depends fields too:
x[grep("boot",x[,"Depends"]), "Depends", drop=F]
(There could have been dependencies on, say, simpleboot). For increased precision,
you'll need to grep more carefully, for "\\<boot\\>". Finally, catching indirect
dependencies requires iterative application, something like this:
> f <- function(s) rownames(x)[grep(paste("\\<",s,"\\>",sep=""),x[,"Depends"])]
> (y <- f("boot"))
[1] "circular" "cramer" "DCluster" "equivalence" "np"
[6] "pastecs" "relaimpo" "sensitivity" "simpleboot" "spdep"
[11] "survrec" "titan" "verification" "Zelig"
> (y0 <- unlist(lapply(y,f)))
[1] "wle" "DCluster" "svcR" "gcmrec" "VDCutil"
> (y0 <- setdiff(y0,y))
[1] "wle" "svcR" "gcmrec" "VDCutil"
> (y <- union(y, y0))
[1] "circular" "cramer" "DCluster" "equivalence" "np"
[6] "pastecs" "relaimpo" "sensitivity" "simpleboot" "spdep"
[11] "survrec" "titan" "verification" "Zelig" "wle"
[16] "svcR" "gcmrec" "VDCutil"
> (y0 <- unlist(lapply(y0,f)))
character(0)
...and stop at this point since there are no more dependents. Otherwise, repeat.
--
O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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