Pharo Script of the Day: Configure R <-> Pharo Smalltalk with RProjectConnector

RProjectConnector is a package to access the R programming language in Pharo. The following script shows how to install and configure it in a clean image, using OSWindows to automatically get the R path installation:

Install OS-Windows

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Metacello new   baseline: 'OSWindows';   repository: 'github://astares/Pharo-OS-Windows/src';   load.

Install RProjectConnector

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Gofer it     smalltalkhubUser: 'VincentBlondeau' project: 'RProjectConnector';     configuration;     loadStable.

Copy R required DLL's into the VM directory:

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| rPath dlls | (rPath := (WinRegistry     queryValue: 'InstallPath'     fromKey: (WinRegistryKey localMachine queryOpenSubkey: 'Software\\R-core\\R')) allButLast) notNil         ifTrue: [             dlls := (rPath asFileReference / 'bin' / 'i386') entries                     select: [ : entry | entry  extension = 'dll' ]                     thenDo: [ : dllEntry |                         dllEntry asFileReference                             copyTo: Smalltalk vmDirectory asFileReference / dllEntry basename ] ].

Finally, we could test with the Iris data set:

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| iris | iris := 'eval' asREval: {RObject findVar: 'iris'}. 'plot' asREval: {   (iris at: 'Petal.Length').   (iris at: 'Petal.Width').   (#pch -> 21).   (#xlab -> 'length').   (#ylab -> 'Width').   (#bg  ->((iris at: 'Species') collect: [ :value | {'red'. 'green3'. 'blue'} at: value ])).   (#main -> 'Edgar Anderson''s Iris Data') }. iris inspect.

Hope you find it useful.