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Id
7604433
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0
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0
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2
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CreationDate
2011-09-29T23:19:35.570
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0
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2011-09-30T03:32:55.907
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2011-09-30T03:32:55.907
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766752
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766752
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6492361
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2
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21
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0
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text
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Here is some quick advice on how to get up and running with R + rJava on Windows 7 64bit. There are several possibilities, but most have fatal flaws. Here is what worked for me: Add jvm.dll to your PATH rJava, the R<->Java bridge, will need jvm.dll, but R will have trouble finding that DLL. It resides in a folder like <pre><code>C:\Program Files\Java\jdk1.6.0_25\jre\bin\server </code></pre> or <pre><code>C:\Program Files\Java\jre6\jre\bin\client </code></pre> Wherever yours is, add that directory to your windows PATH variable. (Windows -> "Path" -> "Edit environment variables to for your account" -> PATH -> edit the value.) You may already have Java on your PATH. If so you should find the client/server directory in the same Java "home" dir as the one already on your PATH. To be safe, make sure your architectures match.If you have Java in <code>Program Files</code>, it is 64-bit, so you ought to run R64. If you have Java in <code>Program Files (x86)</code>, that's 32-bit, so you use plain 32-bit R. Re-launch R from the Windows Menu If R is running, quit. From the Start Menu , Start R / RGUI, RStudio. This is very important, to make R pick up your PATH changes. Install rJava 0.9.2. Earlier versions do not work! Mirrors are not up-to-date, so go to the source at www.rforge.net: <a href="http://www.rforge.net/rJava/files/" rel="noreferrer">http://www.rforge.net/rJava/files/</a>. Note the advice there <pre><code>“Please use `install.packages('rJava',,'http://www.rforge.net/')` to install.” </code></pre> That is almost correct. This actually works: <code>install.packages('rJava', .libPaths()[1], 'http://www.rforge.net/')</code> Watch the punctuation! The mysterious “.libPaths()[1],” just tells R to install the package in the primary library directory. For some reason, leaving the value blank doesn’t work, even though it should default.
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