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POdetach all packages while working in R
 

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  1. POdetach all packages while working in R
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    <p>While working to solve another problem I got this problem:</p> <p>I can remove all R objects by:</p> <pre><code>rm(list = ls(all = TRUE)) </code></pre> <p>Is there equivalent command that can detach installed packages during working session?</p> <pre><code>&gt; sessionInfo() R version 2.12.2 (2011-02-25) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=English_United States.1252 [2] LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 [4] LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base </code></pre> <blockquote> <p>require(ggplot2)</p> </blockquote> <pre><code>Loading required package: ggplot2 Loading required package: reshape Loading required package: plyr Attaching package: 'reshape' The following object(s) are masked from 'package:plyr': round_any Loading required package: grid Loading required package: proto </code></pre> <blockquote> <p>sessionInfo()</p> </blockquote> <pre><code>R version 2.12.2 (2011-02-25) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=English_United States.1252 [2] LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 [4] LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] grid stats graphics grDevices utils datasets methods [8] base other attached packages: [1] ggplot2_0.8.9 proto_0.3-9.1 reshape_0.8.4 plyr_1.4 </code></pre> <p>I tried this way, although even it worked in not a global solution :</p> <pre><code>pkg &lt;- c("package:ggplot2_0.8.9", "package:proto_0.3-9.1", "package:reshape_0.8.4", "package:plyr_1.4") detach(pkg, character.only = TRUE) Error in detach(pkg, character.only = TRUE) : invalid 'name' argument In addition: Warning message: In if (is.na(pos)) stop("invalid 'name' argument") : the condition has length &gt; 1 and only the first element will be used </code></pre> <p>What I am loking for is something global like:</p> <pre><code> rm(list = ls(all = TRUE)) </code></pre> <p>for objects, expect it would not remove attached base packages</p> <p>thanks; </p>
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    1. USJohn Clark
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    1. CONot that your question isn't valid, but why not just restart R?
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      1. USAaron
    2. CO@Aaron because you shouldn't have too ;-) To pass `R CMD check` a package is supposed to cleanly unload itself, so R Core expect this to be possible and something one might wish to do.
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      1. USGavin Simpson
    3. CO@Aaron, I think sometime it might be useful to let session going when some packages are causing or might cause interference, but were used in previous steps ...
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