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(This article was first published on <strong><a href="https://statcompute.wordpress.com/2018/04/11/clojure-integration-with-r/"> S+/R – Yet Another Blog in Statistical Computing</a></strong>, and kindly contributed to <a rel="nofollow" href="https://www.r-bloggers.com/">R-bloggers)</a> </div>
<pre>

(require '[tnoda.rashinban :as rr]
         '[tnoda.rashinban.core :as rc]
         '[clojure.core.matrix.dataset :as dt]
         '[clojure.core.matrix.impl.dataset :as id])

;; CREATE A TOY DATA
(def ds [{:id 1.0 :name &quot;name1&quot;}
         {:id 2.0 :name &quot;name2&quot;}
         {:id 3.0 :name &quot;name3&quot;}])

;; RUN THE FOLLOWING R CODE IN ADVANCE TO START THE RSERVE SERVER:
;;   R -e 'library(Rserve)' -e 'Rserve(args = &quot;--vanilla&quot;)'
(rr/init)

;; PASS THE DATA FROM CLOJURE INTO R
(map (fn [x] (rr/&lt;- (name (key x)) (val x))) 
  (let [ks ((comp keys first) ds)] (zipmap ks (map #(map % ds) ks))))

(rr/&lt;- 'header (map name ((comp keys first) ds)))
         
;; CREATE THE R DATA.FRAME         
(rc/eval &quot;df = data.frame(lapply(header, as.name))&quot;)

;; TEST THE R DATA.FRAME
(rc/eval &quot;df$id&quot;)
; [1.0 2.0 3.0]

(rc/eval &quot;df$name&quot;)
; [&quot;name1&quot; &quot;name2&quot; &quot;name3&quot;]

;; CONVERT THE R DATA.FRAME BACK TO THE CLOJURE MAP
(def mp (into [] (map #(zipmap (map keyword (rr/colnames 'df)) %) 
                   (partition (count (rr/colnames 'df)) (apply interleave (rr/matrix 'df))))))

; [{:id 1.0, :name &quot;name1&quot;} {:id 2.0, :name &quot;name2&quot;} {:id 3.0, :name &quot;name3&quot;}]

;; TEST THE EQUALITY BETWEEN INPUT AND OUTPUT DATA
(= mp ds)
; true

;; ALTERNATIVELY, WE CAN ALSO CONVERT THE R DATA.FRAME TO A CLOJURE DATASET
(def dt (id/dataset-from-columns (map keyword (rr/colnames 'df)) (rr/matrix 'df)))

; #dataset/dataset {:column-names [:id :name], :columns [[1.0 2.0 3.0] [&quot;name1&quot; &quot;name2&quot; &quot;name3&quot;]], :shape [3 2]}

;; NEXT, CONVERT THE DATASET TO THE MAP
(def mp2 (dt/row-maps dt))

; [{:id 1.0, :name &quot;name1&quot;} {:id 2.0, :name &quot;name2&quot;} {:id 3.0, :name &quot;name3&quot;}]

(= ds mp2)
; true

</pre>
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