gnu: Add r-kernlab.

* gnu/packages/machine-learning.scm (r-kernlab): New variable.

gnu/packages/machine-learning.scm

@@ -479,6 +479,28 @@ (define-public r-nnet
 single hidden layer, and for multinomial log-linear models.")
     (license (list license:gpl2+ license:gpl3+))))
 
+(define-public r-kernlab
+  (package
+    (name "r-kernlab")
+    (version "0.9-25")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "kernlab" version))
+       (sha256
+        (base32
+         "0qnaq9x3j2xc6jrmmd98wc6hkzch487s4p3a9lnc00xvahkhgpmr"))))
+    (build-system r-build-system)
+    (home-page "http://cran.r-project.org/web/packages/kernlab")
+    (synopsis "Kernel-based machine learning tools")
+    (description
+     "This package provides kernel-based machine learning methods for
+classification, regression, clustering, novelty detection, quantile regression
+and dimensionality reduction.  Among other methods @code{kernlab} includes
+Support Vector Machines, Spectral Clustering, Kernel PCA, Gaussian Processes
+and a QP solver.")
+    (license license:gpl2)))
+
 (define-public dlib
   (package
     (name "dlib")