How to find out which package version is loaded in R

Question

I am in a process of figuring out how to use my university cluster  It has 2 versions of R installed  System wide R 2 11  Debian 6 0  and R 2 14 2 in non-standard location    I am trying to use MPI together with snow  The code I am trying to run is the following  library snow  library Rmpi  cl  lt - makeMPIcluster mpi universe size  -1  stopCluster cl  mpi quit     It works without the problems on R 2 11   I launch the script with mpirun -H localhost n1 n2 n3 n4 -n 1 R --slave -f code R   Now when I try to do it with R 2 14 2  I get the following message   Error  This is R 2 11 1  package  snow  needs  gt   2 12 1 In addition  Warning message    So it seems that R loads the package snow version compiled for R 2 11  I ve installed snow under R 2 14 into my home folder and I added the following lines to my code    libPaths   soft R lib R library    libPaths    R x86 64-pc-linux-gnu-library 2 11   print  libPaths    print sessionInfo    print version    And the output before the error confirms that I am indeed running R 2 14 2 and my R packages folder is first in search path  But I still get the error    So my question is how do I determine which version of package is loaded in R  I can see with  installed packages all the packages which are installed  so maybe there is some function which lists similar information for loaded packages

User · Answer

GUI solution   If you are using RStudio then you can check the package version in the Packages pane

User · Answer

You can try something like this    package version R version  getRversion

User · Answer

Use the following code to obtain the version of R packages installed in the system   installed packages fields   c   Package    Version

User · Answer

Technically speaking  all of the answers at this time are wrong  packageVersion does not return the version of the loaded package  It goes to the disk  and fetches the package version from there   This will not make a difference in most cases  but sometimes it does  As far as I can tell  the only way to get the version of a loaded package is the rather hackish   asNamespace pkg      NAMESPACE     spec   version      where pkg is the package name   EDIT  I am not sure when this function was added  but you can also use getNamespaceVersion  this is cleaner   getNamespaceVersion pkg

User · Answer

You can use sessionInfo   to accomplish that    gt  sessionInfo   R version 2 15 0  2012-03-30  Platform  x86 64-pc-linux-gnu  64-bit   locale    1  LC CTYPE en US UTF-8       LC NUMERIC C               LC TIME en US UTF-8        LC COLLATE en US UTF-8       5  LC MONETARY en US UTF-8    LC MESSAGES en US UTF-8    LC PAPER C                 LC NAME C                    9  LC ADDRESS C               LC TELEPHONE C             LC MEASUREMENT en US UTF-8 LC IDENTIFICATION C         attached base packages   1  graphics  grDevices utils     datasets  stats     grid      methods   base       other attached packages   1  ggplot2 0 9 0  reshape2 1 2 1 plyr 1 7 1      loaded via a namespace  and not attached     1  colorspace 1 1-1   dichromat 1 2-4    digest 0 5 2       MASS 7 3-18        memoise 0 1        munsell 0 3          7  proto 0 3-9 2      RColorBrewer 1 0-5 scales 0 2 0       stringr 0 6         gt     However  as per comments and the answer below  there are better options   gt  packageVersion  snow      1     0 3 9     Or    Rmpi   in  loadedNamespaces

User · Answer

Based on the previous answers  here is a simple alternative way of printing the R-version  followed by the name and version of each package loaded in the namespace  It works in the Jupyter notebook  where I had troubles running sessionInfo   and R --version   print paste  R   getRversion     print  -------------   for  package name in sort loadedNamespaces           print paste package name  packageVersion package name        Out    1   R 3 2 2   1   -------------   1   AnnotationDbi 1 32 2   1   Biobase 2 30 0   1   BiocGenerics 0 16 1   1   BiocParallel 1 4 3   1   DBI 0 3 1   1   DESeq2 1 10 0   1   Formula 1 2 1   1   GenomeInfoDb 1 6 1   1   GenomicRanges 1 22 3   1   Hmisc 3 17 0   1   IRanges 2 4 6   1   IRdisplay 0 3   1   IRkernel 0 5

User · Answer

You can use packageVersion to see what version of a package is loaded   gt  packageVersion  snow    1     0 3 9      Although it sounds like you want to see what version of R you are running  in which case  Justin s sessionInfo suggestion is the way to go

User · Answer

Use the R method packageDescription to get the installed package description and for version just use  Version as    packageDescription  AppliedPredictiveModeling   Version  1   1 1-6

User · Answer

Old question  but not among the answers is my favorite command to get a quick and short overview of all loaded packages     packages      To see which version is installed of all loaded packages  just use the above command to subset installed packages     installed packages     packages    3    By changing the column number  3 for package version  you can get any other information stored in installed packages   in an easy-to-read matrix  Below is an example for version number and dependency   installed packages     packages    c 3 5

User · Answer

To check the version of R execute   R --version  Or after you are in the R shell print the contents of version version string   EDIT  To check the version of installed packages do the following   After loading the library  you can execute sessionInfo     But to know the list of all installed packages   packinfo  lt - installed packages fields   c  Package    Version    packinfo  c  Package    Version      OR to extract a specific library version  once you have extracted the information using the installed package function as above just use the name of the package in the first dimension of the matrix   packinfo  RANN  c  Package    Version    packinfo  graphics  c  Package    Version      The above will print the versions of the RANN library and the graphics library

User · Answer

Simply use help package  my package   and look at the version shown    This assumes there are no other package versions in the same  libPaths

User · Answer

Search   can give a more simplified list of the attached packages in a session  i e   without the detailed info given by sessionInfo     search  base - R Documentation Description  Gives a list of attached packages  Search    search     1    GlobalEnv          package Rfacebook   package httpuv       package rjson        5   package httr        package bindrcpp    package forcats         package stringr      9   package dplyr       package purrr       package readr         package tidyr        13   package tibble      package ggplot2     package tidyverse     tools rstudio        17   package stats       package graphics    package grDevices     package utils        21   package datasets    package methods     Autoloads             package base

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