In CRAN, each package has Package Depends, Imports and LinkingTo http://cran.r-project.org/web/packages/Rcpp/index.html. Is there a build-in function or a function from an R package that can return the same information? Thanks.
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1Are you looking for something that queries CRAN to get this information, or something that gets the information about a currently-installed package? – David Robinson Jul 06 '15 at 19:15
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Bioconductor's [pkgDepTools](http://bioconductor.org/packages/1.9/bioc/vignettes/pkgDepTools/inst/doc/pkgDepTools.pdf) might be of use. – hrbrmstr Jul 06 '15 at 19:44
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Sure. Both available.packages() and installed.packages() have it:
R> AP <- available.packages()
R> dim(AP)
[1] 6793 17
R> AP[1:5, c("Depends", "Imports", "LinkingTo")]
Depends Imports LinkingTo
A3 "R (>= 2.15.0), xtable, pbapply" NA NA
abbyyR "R (>= 3.2.0)" "httr, XML" NA
abc "R (>= 2.10), abc.data, nnet, quantreg, MASS, locfit" NA NA
ABCanalysis "R (>= 2.10)" "Hmisc, plotrix" NA
abc.data "R (>= 2.10)" NA NA
R>
Dirk Eddelbuettel
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The package DESCRIPTION file has this info. The function in the utils package packageDescription will parse and read this. See ?packageDescription
Nick Kennedy
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