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Mixing Haskell, R with HaskellR

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Mixing Haskell, R with HaskellR

Few languages are more dissimilar than Haskell and R, but because of that, some things that are hard in one become easy in the other.

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Haskell was designed to enforce programming discipline; R was designed for interactive use. Haskell emphasizes correctness; R emphasizes convenience.  Haskell emphasizes computer efficiency; R emphasizes interactive user efficiency. Haskell was written to be a proving ground for programming language theorists. R was written to be a workbench for statisticians. Very different goals lead to very different languages.

When I first heard of a project to mix Haskell and R, I was a little shocked. Could it even be done? Aside from the external differences listed above, the differences in language internals are vast. I’m very impressed that the folks at Tweag I/O were able to pull this off. Their HaskellR project lets you call R from Haskell and vice versa. (It’s primarily for Haskell calling R, though you can call Haskell functions from your R code: Haskell calling R calling Haskell. It kinda hurts your brain at first.) 

I used HaskellR while it was under initial development. Our project was written in Haskell, but we wanted to access R libraries. There were a few difficulties along the way, as with any project, but these were resolved and eventually it just worked.

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Topics:
haskell ,r language ,performance ,reviews

Published at DZone with permission of John Cook, DZone MVB. See the original article here.

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