;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2015 Vicente Vera Parra <vicentemvp@gmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages statistics)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix utils)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system r)
  #:use-module (gnu packages)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages gtk)
  #:use-module (gnu packages icu4c)
  #:use-module (gnu packages image)
  #:use-module (gnu packages java)
  #:use-module (gnu packages maths)
  #:use-module (gnu packages pcre)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages readline)
  #:use-module (gnu packages texlive)
  #:use-module (gnu packages texinfo)
  #:use-module (gnu packages base)
  #:use-module (gnu packages xorg))

(define-public r
  (package
    (name "r")
    (version "3.2.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/base/R-"
                                  (version-prefix version 1) "/R-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "07a6s865bjnh7w0fqsrkv1pva76w99v86w0w787qpdil87km54cw"))))
    (build-system gnu-build-system)
    (arguments
     `(#:make-flags
       (list (string-append "LDFLAGS=-Wl,-rpath="
                            (assoc-ref %outputs "out")
                            "/lib/R/lib"))
       #:phases
       (modify-phases %standard-phases
         (add-before
          'configure 'set-default-pager
          ;; Set default pager to "cat", because otherwise it is "false",
          ;; making "help()" print nothing at all.
          (lambda _ (setenv "PAGER" "cat") #t))
         (add-before
          'check 'set-timezone
          ;; Some tests require the timezone to be set.
          (lambda _ (setenv "TZ" "UTC") #t))
         (add-after 'build 'make-info
          (lambda _ (zero? (system* "make" "info"))))
         (add-after 'build 'install-info
          (lambda _ (zero? (system* "make" "install-info")))))
       #:configure-flags
       '("--with-blas=openblas"
         "--with-lapack"
         "--with-cairo"
         "--with-libpng"
         "--with-jpeglib"
         "--with-libtiff"
         "--with-ICU"
         "--enable-R-shlib"
         "--enable-BLAS-shlib"
         "--with-system-zlib"
         "--with-system-bzlib"
         "--with-system-pcre"
         "--with-system-tre"
         "--with-system-xz")))
    ;; R has some support for Java.  When the JDK is available at configure
    ;; time environment variables pointing to the JDK will be recorded under
    ;; $R_HOME/etc and ./tools/getsp.java will be compiled which is used by "R
    ;; CMD javareconf".  "R CMD javareconf" appears to only be used to update
    ;; the recorded environment variables in $R_HOME/etc.  Refer to
    ;; https://cran.r-project.org/doc/manuals/r-release/R-admin.html#Java-support
    ;; for additional information.

    ;; As the JDK is a rather large input with only very limited effects on R,
    ;; we decided to drop it.
    (native-inputs
     `(("bzip2" ,bzip2)
       ("perl" ,perl)
       ("pkg-config" ,pkg-config)
       ("texinfo" ,texinfo) ; for building HTML manuals
       ("which" ,which) ; for tests/Examples/base-Ex.R
       ("xz" ,xz)))
    (inputs
     `(("openblas" ,openblas)
       ("cairo" ,cairo)
       ("gfortran" ,gfortran)
       ("icu4c" ,icu4c)
       ("lapack" ,lapack)
       ("libjpeg" ,libjpeg)
       ("libpng" ,libpng)
       ("libtiff" ,libtiff)
       ("libxt" ,libxt)
       ("pcre" ,pcre)
       ("readline" ,readline)
       ("zlib" ,zlib)))
    (native-search-paths
     (list (search-path-specification
            (variable "R_LIBS_SITE")
            (files (list "site-library/")))))
    (home-page "http://www.r-project.org/")
    (synopsis "Environment for statistical computing and graphics")
    (description
     "R is a language and environment for statistical computing and graphics.
It provides a variety of statistical techniques, such as linear and nonlinear
modeling, classical statistical tests, time-series analysis, classification
and clustering.  It also provides robust support for producing
publication-quality data plots.  A large amount of 3rd-party packages are
available, greatly increasing its breadth and scope.")
    (license license:gpl3+)))

(define-public r-colorspace
  (package
    (name "r-colorspace")
    (version "1.2-6")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/colorspace_"
                           version ".tar.gz"))
       (sha256
        (base32 "0y8n4ljwhbdvkysdwgqzcnpv107pb3px1jip3k6svv86p72nacds"))))
    (build-system r-build-system)
    (home-page "http://cran.r-project.org/web/packages/colorspace")
    (synopsis "Color space manipulation")
    (description
     "This package carries out a mapping between assorted color spaces
including RGB, HSV, HLS, CIEXYZ, CIELUV, HCL (polar CIELUV), CIELAB and polar
CIELAB.  Qualitative, sequential, and diverging color palettes based on HCL
colors are provided.")
    (license license:bsd-3)))

(define-public r-dichromat
  (package
    (name "r-dichromat")
    (version "2.0-0")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/dichromat_"
                           version ".tar.gz"))
       (sha256
        (base32 "1l8db1nk29ccqg3mkbafvfiw0775iq4gapysf88xq2zp6spiw59i"))))
    (build-system r-build-system)
    (home-page "http://cran.r-project.org/web/packages/dichromat")
    (synopsis "Color schemes for dichromats")
    (description
     "Dichromat collapses red-green or green-blue distinctions to simulate the
effects of different types of color-blindness.")
    (license license:gpl2+)))

(define-public r-digest
  (package
    (name "r-digest")
    (version "0.6.8")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/digest_"
                           version ".tar.gz"))
       (sha256
        (base32 "0m9grqv67hhf51lz10whymhw0g0d98466ka694kya5x95hn44qih"))))
    (build-system r-build-system)
    (home-page "http://dirk.eddelbuettel.com/code/digest.html")
    (synopsis "Create cryptographic hash digests of R objects")
    (description
     "This package contains an implementation of a function 'digest()' for the
creation of hash digests of arbitrary R objects (using the md5, sha-1,
sha-256, crc32, xxhash and murmurhash algorithms) permitting easy comparison
of R language objects, as well as a function 'hmac()' to create hash-based
message authentication code.

Please note that this package is not meant to be deployed for cryptographic
purposes for which more comprehensive (and widely tested) libraries such as
OpenSSL should be used.")
    (license license:gpl2+)))

(define-public r-gtable
  (package
    (name "r-gtable")
    (version "0.1.2")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/gtable_"
                           version ".tar.gz"))
       (sha256
        (base32 "0k9hfj6r5y238gqh92s3cbdn34biczx3zfh79ix5xq0c5vkai2xh"))))
    (build-system r-build-system)
    (home-page "https://cran.r-project.org/web/packages/gtable")
    (synopsis "R library to arrange grobs in tables")
    (description
     "Gtable is a collection of tools to make it easier to work with
\"tables\" of grobs.")
    (license license:gpl2+)))

(define-public r-labeling
  (package
    (name "r-labeling")
    (version "0.3")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/labeling_"
                           version ".tar.gz"))
       (sha256
        (base32 "13sk7zrrrzry6ky1bp8mmnzcl9jhvkig8j4id9nny7z993mnk00d"))))
    (build-system r-build-system)
    (home-page "http://cran.r-project.org/web/packages/labeling")
    (synopsis "Axis labeling algorithms")
    (description "The labeling package provides a range of axis labeling
algorithms.")
    (license license:expat)))

(define-public r-magrittr
  (package
    (name "r-magrittr")
    (version "1.5")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/magrittr_"
                           version ".tar.gz"))
       (sha256
        (base32 "1s1ar6rag8m277qcqmdp02gn4awn9bdj9ax0r8s32i59mm1mki05"))))
    (build-system r-build-system)
    (home-page "http://cran.r-project.org/web/packages/magrittr/index.html")
    (synopsis "A forward-pipe operator for R")
    (description
     "Magrittr provides a mechanism for chaining commands with a new
forward-pipe operator, %>%.  This operator will forward a value, or the result
of an expression, into the next function call/expression.  There is flexible
support for the type of right-hand side expressions.  For more information,
see package vignette.  To quote Rene Magritte, \"Ceci n'est pas un pipe.\"")
    (license license:expat)))

(define-public r-munsell
  (package
    (name "r-munsell")
    (version "0.4.2")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/munsell_"
                           version ".tar.gz"))
       (sha256
        (base32 "1bi5yi0i80778bbzx2rm4f0glpc34kvh24pwwfhm4v32izsqgrw4"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-colorspace" ,r-colorspace)))
    (home-page "http://cran.r-project.org/web/packages/munsell")
    (synopsis "Munsell colour system")
    (description
     "The Munsell package contains Functions for exploring and using the
Munsell colour system.")
    (license license:expat)))

(define-public r-rcpp
  (package
    (name "r-rcpp")
    (version "0.12.0")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/Rcpp_"
                           version ".tar.gz"))
       (sha256
        (base32 "182109z0yc1snqgd833ssl2cix6cbq83bcxmy5344b15ym820y38"))))
    (build-system r-build-system)
    (home-page "http://www.rcpp.org")
    (synopsis "Seamless R and C++ Integration")
    (description
     "The Rcpp package provides R functions as well as C++ classes which offer
a seamless integration of R and C++.  Many R data types and objects can be
mapped back and forth to C++ equivalents which facilitates both writing of new
code as well as easier integration of third-party libraries.  Documentation
about Rcpp is provided by several vignettes included in this package, via the
'Rcpp Gallery' site at <http://gallery.rcpp.org>, the paper by Eddelbuettel
and Francois (2011, JSS), and the book by Eddelbuettel (2013, Springer); see
'citation(\"Rcpp\")' for details on these last two.")
    (license license:gpl2+)))

(define-public r-plyr
  (package
    (name "r-plyr")
    (version "1.8.3")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/plyr_"
                           version ".tar.gz"))
       (sha256
        (base32 "06v4zxawpjz37rp2q2ii5q43g664z9s29j4ydn0cz3crn7lzl6pk"))))
    (build-system r-build-system)
    (native-inputs `(("r-rcpp" ,r-rcpp)))
    (home-page "http://had.co.nz/plyr")
    (synopsis "Tools for Splitting, Applying and Combining Data")
    (description
     "Plyr is a set of tools that solves a common set of problems: you need to
break a big problem down into manageable pieces, operate on each piece and
then put all the pieces back together.  For example, you might want to fit a
model to each spatial location or time point in your study, summarise data by
panels or collapse high-dimensional arrays to simpler summary statistics.")
    (license license:expat)))

(define-public r-proto
  (package
    (name "r-proto")
    (version "0.3-10")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/proto_" version ".tar.gz"))
       (sha256
        (base32 "03mvzi529y6kjcp9bkpk7zlgpcakb3iz73hca6rpjy14pyzl3nfh"))))
    (build-system r-build-system)
    (home-page "http://r-proto.googlecode.com")
    (synopsis "Prototype object-based programming")
    (description
     "Proto is an object oriented system using object-based, also called
prototype-based, rather than class-based object oriented ideas.")
    (license license:gpl2+)))

(define-public r-rcolorbrewer
  (package
    (name "r-rcolorbrewer")
    (version "1.1-2")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/RColorBrewer_"
                           version ".tar.gz"))
       (sha256
        (base32 "1pfcl8z1pnsssfaaz9dvdckyfnnc6rcq56dhislbf571hhg7isgk"))))
    (build-system r-build-system)
    (home-page "http://cran.r-project.org/web/packages/RColorBrewer")
    (synopsis "ColorBrewer palettes")
    (description
     "This package provides color schemes for maps (and other graphics)
designed by Cynthia Brewer as described at http://colorbrewer2.org")
    ;; Includes code licensed under bsd-4
    (license license:asl2.0)))

(define-public r-stringi
  (package
    (name "r-stringi")
    (version "0.5-5")
    (source
     (origin
       (method url-fetch)
       (uri (string-append
             "mirror://cran/src/contrib/stringi_"
             version
             ".tar.gz"))
       (sha256
        (base32
         "183wrrjhpgl1wbnn9lhghyvhz7l2mc64mpcmzplckal7y9j7pmhw"))))
    (build-system r-build-system)
    (inputs `(("icu4c" ,icu4c)))
    (native-inputs `(("pkg-config" ,pkg-config)))
    (home-page "http://stringi.rexamine.com/")
    (synopsis "Character string processing facilities")
    (description
     "This package allows for fast, correct, consistent, portable, as well as
convenient character string/text processing in every locale and any native
encoding.  Owing to the use of the ICU library, the package provides R users
with platform-independent functions known to Java, Perl, Python, PHP, and Ruby
programmers.  Among available features there are: pattern searching
 (e.g.  via regular expressions), random string generation, string collation,
transliteration, concatenation, date-time formatting and parsing, etc.")
    (license license:bsd-3)))

(define-public r-stringr
  (package
    (name "r-stringr")
    (version "1.0.0")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/stringr_"
                           version ".tar.gz"))
       (sha256
        (base32 "0jnz6r9yqyf7dschr2fnn1slg4wn6b4ik5q00j4zrh43bfw7s9pq"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-magrittr" ,r-magrittr)
       ("r-stringi" ,r-stringi)))
    (home-page "https://github.com/hadley/stringr")
    (synopsis "Simple, consistent wrappers for common string operations")
    (description
     "Stringr is a consistent, simple and easy to use set of wrappers around
the fantastic 'stringi' package.  All function and argument names (and
positions) are consistent, all functions deal with \"NA\"'s and zero length
vectors in the same way, and the output from one function is easy to feed into
the input of another.")
    (license license:gpl2+)))

(define-public r-reshape2
  (package
    (name "r-reshape2")
    (version "1.4.1")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/reshape2_"
                           version ".tar.gz"))
       (sha256
        (base32 "0hl082dyk3pk07nqprpn5dvnrkqhnf6zjnjig1ijddxhlmsrzm7v"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-plyr" ,r-plyr)
       ("r-rcpp" ,r-rcpp)
       ("r-stringr" ,r-stringr)))
    (home-page "https://github.com/hadley/reshape")
    (synopsis "Flexibly reshape data: a reboot of the \"reshape\" package")
    (description
     "Reshape2 is an R library to flexibly restructure and aggregate data
using just two functions: melt and dcast (or acast).")
    (license license:expat)))

(define-public r-scales
  (package
    (name "r-scales")
    (version "0.2.5")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/scales_"
                           version ".tar.gz"))
       (sha256
        (base32 "12xrmn1vh64dl46bq7n7pa427aicb2ifjrby9in3m32nyvir0kac"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-dichromat" ,r-dichromat)
       ("r-labeling" ,r-labeling)
       ("r-munsell" ,r-munsell)
       ("r-plyr" ,r-plyr)
       ("r-rcolorbrewer" ,r-rcolorbrewer)
       ("r-rcpp" ,r-rcpp)))
    (home-page "https://github.com/hadley/scales")
    (synopsis "Scale functions for visualization")
    (description
     "This package provides graphical scales that map data to aesthetics, and
provides methods for automatically determining breaks and labels for axes and
legends.")
    (license license:expat)))

(define-public r-ggplot2
  (package
    (name "r-ggplot2")
    (version "1.0.1")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://cran/src/contrib/ggplot2_"
                           version ".tar.gz"))
       (sha256
        (base32 "0794kjqi3lrxb33lr1mykd58959hlgkhdn259vj8fxrh65mqw920"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-digest" ,r-digest)
       ("r-gtable" ,r-gtable)
       ("r-plyr" ,r-plyr)
       ("r-proto" ,r-proto)
       ("r-reshape2" ,r-reshape2)
       ("r-scales" ,r-scales)))
    (home-page "http://ggplot2.org")
    (synopsis "An implementation of the grammar of graphics")
    (description
     "Ggplot2 is an implementation of the grammar of graphics in R.  It
combines the advantages of both base and lattice graphics: conditioning and
shared axes are handled automatically, and you can still build up a plot step
by step from multiple data sources.  It also implements a sophisticated
multidimensional conditioning system and a consistent interface to map data to
aesthetic attributes.")
    (license license:gpl2+)))

(define-public r-assertthat
  (package
    (name "r-assertthat")
    (version "0.1")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/assertthat_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "0dwsqajyglfscqilj843qfqn1ndbqpswa7b4l1d633qjk9d68qqk"))))
    (build-system r-build-system)
    (home-page
     "https://github.com/hadley/assertthat")
    (synopsis
     "Easy pre and post assertions")
    (description
     "Assertthat is an extension to stopifnot() that makes it easy to declare
the pre and post conditions that your code should satisfy, while also
producing friendly error messages so that your users know what they've done
wrong.")
    (license license:gpl3+)))

(define-public r-lazyeval
  (package
    (name "r-lazyeval")
    (version "0.1.10")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/lazyeval_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "02qfpn2fmy78vx4jxr7g7rhqzcm1kcivfwai7lbh0vvpawia0qwh"))))
    (build-system r-build-system)
    (home-page
     "https://github.com/hadley/lazyeval")
    (synopsis
     "Lazy (non-standard) evaluation in R")
    (description
     "This package provides the tools necessary to do non-standard
evaluation (NSE) in R.")
    (license license:gpl3+)))

(define-public r-dbi
  (package
    (name "r-dbi")
    (version "0.3.1")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/DBI_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "0xj5baxwnhl23rd5nskhjvranrwrc68f3xlyrklglipi41bm69hw"))))
    (build-system r-build-system)
    (home-page
     "https://github.com/rstats-db/DBI")
    (synopsis
     "R database interface")
    (description
     "The DBI package provides a database interface (DBI) definition for
communication between R and relational database management systems.  All
classes in this package are virtual and need to be extended by the various
R/DBMS implementations.")
    (license license:lgpl3+)))

(define-public r-bh
  (package
    (name "r-bh")
    (version "1.58.0-1")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/BH_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "17rnwyw9ib2pvm60iixzkbz7ff4fslpifp1nlx4czp42hy67kqpf"))))
    (build-system r-build-system)
    (home-page
     "https://github.com/eddelbuettel/bh")
    (synopsis
     "Boost C++ header files")
    (description
     "This package aims to provide the most useful subset of Boost libraries
for template use among CRAN packages.  By placing these libraries in this
package, we offer a more efficient distribution system for CRAN as replication
of this code in the sources of other packages is avoided.")
    (license license:boost1.0)))

(define-public r-evaluate
  (package
    (name "r-evaluate")
    (version "0.7.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/evaluate_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "0r4jl32d817w9472l7a240w3aip5h7v0vw7byvkwqwv8gnx8r7xv"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-stringr" ,r-stringr)))
    (home-page
     "https://github.com/hadley/evaluate")
    (synopsis
     "Parsing and evaluation tools for R")
    (description
     "This package provides tools that allow you to recreate the parsing,
evaluation and display of R code, with enough information that you can
accurately recreate what happens at the command line.  The tools can easily be
adapted for other output formats, such as HTML or LaTeX.")
    (license license:gpl3+)))

(define-public r-formatr
  (package
    (name "r-formatr")
    (version "1.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/formatR_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "0dlj728qdm7wmxcxvw1ip64pl4ajgmi8ax69zafrn3306pg9y136"))))
    (build-system r-build-system)
    (home-page
     "http://yihui.name/formatR")
    (synopsis
     "Format R code automatically")
    (description
     "This package provides a function to format R source code.  Spaces and
indent will be added to the code automatically, and comments will be preserved
under certain conditions, so that R code will be more human-readable and tidy.
There is also a Shiny app as a user interface in this package.")
    (license license:gpl3+)))

(define-public r-highr
  (package
    (name "r-highr")
    (version "0.5")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/highr_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "0jnab5pk5sg4f5krsg5jdamr4y40z2pzxhp5h6fb6wys3m75hzny"))))
    (build-system r-build-system)
    (home-page
     "https://github.com/yihui/highr")
    (synopsis
     "Syntax highlighting for R source code")
    (description
     "This package provides syntax highlighting for R source code.  Currently
it supports LaTeX and HTML output.  Source code of other languages is supported
via Andre Simon's highlight package (http://www.andre-simon.de).")
    (license license:gpl3+)))

(define-public r-mime
  (package
    (name "r-mime")
    (version "0.4")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/mime_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "145cdcg252w2zsq67dmvmsqka60msfp7agymlxs3gl3ihgiwg46p"))))
    (build-system r-build-system)
    (home-page
     "https://github.com/yihui/mime")
    (synopsis
     "R package to map filenames to MIME types")
    (description
     "This package guesses the MIME type from a filename extension using the
data derived from /etc/mime.types in UNIX-type systems.")
    (license license:gpl2)))

(define-public r-markdown
  (package
    (name "r-markdown")
    (version "0.7.7")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/markdown_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "00j1hlib3il50azs2vlcyhi0bjpx1r50mxr9w9dl5g1bwjjc71hb"))))
    (build-system r-build-system)
    ;; Skip check phase because the tests require the r-knitr package to be
    ;; installed. This prevents installation failures. Knitr normally
    ;; shouldn't be available since r-markdown is a dependency of the r-knitr
    ;; package.
    (arguments `(#:tests? #f))
    (propagated-inputs
     `(("r-mime" ,r-mime)))
    (home-page
     "https://github.com/rstudio/markdown")
    (synopsis
     "Markdown rendering for R")
    (description
     "This package provides R bindings to the Sundown Markdown rendering
library (https://github.com/vmg/sundown).  Markdown is a plain-text formatting
syntax that can be converted to XHTML or other formats.  See
http://en.wikipedia.org/wiki/Markdown for more information about Markdown.")
    (license license:gpl2)))

(define-public r-yaml
  (package
    (name "r-yaml")
    (version "2.1.13")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/yaml_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "18kz5mfn7qpif5pn91w4vbrc5bkycsj85vwm5wxwzjlb02i9mxi6"))))
    (build-system r-build-system)
    (home-page
     "https://cran.r-project.org/web/packages/yaml/index.html")
    (synopsis
     "Methods to convert R data to YAML and back")
    (description
     "This package implements the libyaml YAML 1.1 parser and
emitter (http://pyyaml.org/wiki/LibYAML) for R.")
    (license license:bsd-3)))

(define-public r-knitr
  (package
    (name "r-knitr")
    (version "1.11")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/knitr_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "1ikjla0hnpjfkdbydqhhqypc0aiizbi4nyn8c694sdk9ca4jasdd"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-evaluate" ,r-evaluate)
       ("r-digest" ,r-digest)
       ("r-formatr" ,r-formatr)
       ("r-highr" ,r-highr)
       ("r-markdown" ,r-markdown)
       ("r-stringr" ,r-stringr)
       ("r-yaml" ,r-yaml)))
    (home-page
     "http://yihui.name/knitr/")
    (synopsis
     "General-purpose package for dynamic report generation in R")
    (description
     "This package provides a general-purpose tool for dynamic report
generation in R using Literate Programming techniques.")
    (license license:gpl2+)))

(define-public r-microbenchmark
  (package
    (name "r-microbenchmark")
    (version "1.4-2")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/microbenchmark_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "05yxvdnkxr2ll94h6f2m5sn3gg7vrlm9nbdxgmj2g8cp8gfxpfkg"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-ggplot2" ,r-ggplot2)))
    (home-page
     "https://cran.r-project.org/web/packages/microbenchmark/index.html")
    (synopsis
     "Accurate Timing Functions for R")
    (description
     "This package provides infrastructure to accurately measure and compare
the execution time of R expressions.")
    (license license:bsd-2)))

(define-public r-codetools
  (package
    (name "r-codetools")
    (version "0.2-14")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/codetools_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "0y9r4m2b8xgavr89sc179knzwpz54xljbc1dinpq2q07i4xn0397"))))
    (build-system r-build-system)
    (home-page
     "https://cran.r-project.org/web/packages/codetools/index.html")
    (synopsis
     "Code analysis tools for R")
    (description
     "This package provides code analysis tools for R.")
    (license license:gpl3+)))

(define-public r-pryr
  (package
    (name "r-pryr")
    (version "0.1.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/pryr_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "1in350a8hxwf580afavasvn3jc7x2p1b7nlwmj1scakfz74vghk5"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-stringr" ,r-stringr)
       ("r-codetools" ,r-codetools)
       ("r-rcpp" ,r-rcpp)))
    (home-page
     "https://github.com/hadley/pryr")
    (synopsis
     "Tools for computing on the R language")
    (description
     "This package provides useful tools to pry back the covers of R and
understand the language at a deeper level.")
    (license license:gpl2)))

(define-public r-memoise
  (package
    (name "r-memoise")
    (version "0.2.1")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://cran/src/contrib/memoise_"
                                  version ".tar.gz"))
              (sha256
               (base32
                "19wm4b3kq6xva43kga3xydnl7ybl5mq7b4y2fczgzzjz63jd75y4"))))
    (build-system r-build-system)
    (propagated-inputs
     `(("r-digest" ,r-digest)))
    (home-page
     "http://github.com/hadley/memoise")
    (synopsis
     "Memoise functions for R")
    (description
     "This package allows to cache the results of a function so that when you
call it again with the same arguments it returns the pre-computed value.")
    (license license:expat)))