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333 lines
12 KiB
EmacsLisp
333 lines
12 KiB
EmacsLisp
;;; ob-R.el --- org-babel functions for R code evaluation
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;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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;; Dan Davison
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;; Keywords: literate programming, reproducible research, R, statistics
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;; Homepage: http://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org-Babel support for evaluating R code
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;;; Code:
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(require 'ob)
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(require 'ob-ref)
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(require 'ob-comint)
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(require 'ob-eval)
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(eval-when-compile (require 'cl))
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(declare-function orgtbl-to-tsv "org-table" (table params))
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(declare-function R "ext:essd-r" (&optional start-args))
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(declare-function inferior-ess-send-input "ext:ess-inf" ())
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(declare-function ess-make-buffer-current "ext:ess-inf" ())
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(declare-function ess-eval-buffer "ext:ess-inf" (vis))
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(declare-function org-number-sequence "org-compat" (from &optional to inc))
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(defconst org-babel-header-arg-names:R
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'(width height bg units pointsize antialias quality compression
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res type family title fonts version paper encoding
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pagecentre colormodel useDingbats horizontal)
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"R-specific header arguments.")
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(defvar org-babel-default-header-args:R '())
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(defvar org-babel-R-command "R --slave --no-save"
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"Name of command to use for executing R code.")
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(defvar ess-local-process-name)
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(defun org-babel-edit-prep:R (info)
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(let ((session (cdr (assoc :session (nth 2 info)))))
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(when (and session (string-match "^\\*\\(.+?\\)\\*$" session))
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(save-match-data (org-babel-R-initiate-session session nil))
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(setq ess-local-process-name (match-string 1 session)))))
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(defun org-babel-expand-body:R (body params &optional graphics-file)
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"Expand BODY according to PARAMS, return the expanded body."
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(let ((graphics-file
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(or graphics-file (org-babel-R-graphical-output-file params))))
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(mapconcat
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#'identity
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((lambda (inside)
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(if graphics-file
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(append
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(list (org-babel-R-construct-graphics-device-call
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graphics-file params))
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inside
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(list "dev.off()"))
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inside))
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(append (org-babel-variable-assignments:R params)
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(list body))) "\n")))
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(defun org-babel-execute:R (body params)
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"Execute a block of R code.
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This function is called by `org-babel-execute-src-block'."
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(save-excursion
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(let* ((result-params (cdr (assoc :result-params params)))
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(result-type (cdr (assoc :result-type params)))
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(session (org-babel-R-initiate-session
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(cdr (assoc :session params)) params))
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(colnames-p (cdr (assoc :colnames params)))
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(rownames-p (cdr (assoc :rownames params)))
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(graphics-file (org-babel-R-graphical-output-file params))
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(full-body (org-babel-expand-body:R body params graphics-file))
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(result
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(org-babel-R-evaluate
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session full-body result-type result-params
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(or (equal "yes" colnames-p)
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(org-babel-pick-name
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(cdr (assoc :colname-names params)) colnames-p))
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(or (equal "yes" rownames-p)
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(org-babel-pick-name
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(cdr (assoc :rowname-names params)) rownames-p)))))
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(if graphics-file nil result))))
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(defun org-babel-prep-session:R (session params)
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"Prepare SESSION according to the header arguments specified in PARAMS."
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(let* ((session (org-babel-R-initiate-session session params))
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(var-lines (org-babel-variable-assignments:R params)))
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(org-babel-comint-in-buffer session
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(mapc (lambda (var)
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(end-of-line 1) (insert var) (comint-send-input nil t)
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(org-babel-comint-wait-for-output session)) var-lines))
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session))
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(defun org-babel-load-session:R (session body params)
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"Load BODY into SESSION."
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(save-window-excursion
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(let ((buffer (org-babel-prep-session:R session params)))
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(with-current-buffer buffer
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(goto-char (process-mark (get-buffer-process (current-buffer))))
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(insert (org-babel-chomp body)))
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buffer)))
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;; helper functions
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(defun org-babel-variable-assignments:R (params)
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"Return list of R statements assigning the block's variables"
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(let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
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(mapcar
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(lambda (pair)
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(org-babel-R-assign-elisp
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(car pair) (cdr pair)
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(equal "yes" (cdr (assoc :colnames params)))
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(equal "yes" (cdr (assoc :rownames params)))))
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(mapcar
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(lambda (i)
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(cons (car (nth i vars))
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(org-babel-reassemble-table
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(cdr (nth i vars))
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(cdr (nth i (cdr (assoc :colname-names params))))
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(cdr (nth i (cdr (assoc :rowname-names params)))))))
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(org-number-sequence 0 (1- (length vars)))))))
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(defun org-babel-R-quote-tsv-field (s)
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"Quote field S for export to R."
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(if (stringp s)
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(concat "\"" (mapconcat 'identity (split-string s "\"") "\"\"") "\"")
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(format "%S" s)))
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(defun org-babel-R-assign-elisp (name value colnames-p rownames-p)
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"Construct R code assigning the elisp VALUE to a variable named NAME."
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(if (listp value)
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(let ((transition-file (org-babel-temp-file "R-import-")))
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;; ensure VALUE has an orgtbl structure (depth of at least 2)
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(unless (listp (car value)) (setq value (list value)))
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(with-temp-file transition-file
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(insert (orgtbl-to-tsv value '(:fmt org-babel-R-quote-tsv-field)))
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(insert "\n"))
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(format "%s <- read.table(\"%s\", header=%s, row.names=%s, sep=\"\\t\", as.is=TRUE)"
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name (org-babel-process-file-name transition-file 'noquote)
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(if (or (eq (nth 1 value) 'hline) colnames-p) "TRUE" "FALSE")
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(if rownames-p "1" "NULL")))
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(format "%s <- %s" name (org-babel-R-quote-tsv-field value))))
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(defvar ess-ask-for-ess-directory nil)
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(defun org-babel-R-initiate-session (session params)
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"If there is not a current R process then create one."
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(unless (string= session "none")
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(let ((session (or session "*R*"))
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(ess-ask-for-ess-directory
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(and ess-ask-for-ess-directory (not (cdr (assoc :dir params))))))
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(if (org-babel-comint-buffer-livep session)
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session
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(save-window-excursion
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(require 'ess) (R)
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(rename-buffer
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(if (bufferp session)
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(buffer-name session)
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(if (stringp session)
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session
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(buffer-name))))
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(current-buffer))))))
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(defvar ess-local-process-name nil)
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(defun org-babel-R-associate-session (session)
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"Associate R code buffer with an R session.
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Make SESSION be the inferior ESS process associated with the
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current code buffer."
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(setq ess-local-process-name
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(process-name (get-buffer-process session)))
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(ess-make-buffer-current))
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(defun org-babel-R-graphical-output-file (params)
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"Name of file to which R should send graphical output."
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(and (member "graphics" (cdr (assq :result-params params)))
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(cdr (assq :file params))))
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(defun org-babel-R-construct-graphics-device-call (out-file params)
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"Construct the call to the graphics device."
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(let ((devices
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'((:bmp . "bmp")
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(:jpg . "jpeg")
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(:jpeg . "jpeg")
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(:tex . "tikz")
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(:tiff . "tiff")
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(:png . "png")
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(:svg . "svg")
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(:pdf . "pdf")
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(:ps . "postscript")
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(:postscript . "postscript")))
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(allowed-args '(:width :height :bg :units :pointsize
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:antialias :quality :compression :res
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:type :family :title :fonts :version
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:paper :encoding :pagecentre :colormodel
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:useDingbats :horizontal))
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(device (and (string-match ".+\\.\\([^.]+\\)" out-file)
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(match-string 1 out-file)))
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(extra-args (cdr (assq :R-dev-args params))) filearg args)
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(setq device (or (and device (cdr (assq (intern (concat ":" device))
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devices))) "png"))
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(setq filearg
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(if (member device '("pdf" "postscript" "svg" "tikz")) "file" "filename"))
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(setq args (mapconcat
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(lambda (pair)
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(if (member (car pair) allowed-args)
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(format ",%s=%s"
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(substring (symbol-name (car pair)) 1)
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(cdr pair)) ""))
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params ""))
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(format "%s(%s=\"%s\"%s%s%s)"
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device filearg out-file args
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(if extra-args "," "") (or extra-args ""))))
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(defvar org-babel-R-eoe-indicator "'org_babel_R_eoe'")
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(defvar org-babel-R-eoe-output "[1] \"org_babel_R_eoe\"")
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(defvar org-babel-R-write-object-command "{function(object,transfer.file){object;invisible(if(inherits(try({tfile<-tempfile();write.table(object,file=tfile,sep=\"\\t\",na=\"nil\",row.names=%s,col.names=%s,quote=FALSE);file.rename(tfile,transfer.file)},silent=TRUE),\"try-error\")){if(!file.exists(transfer.file))file.create(transfer.file)})}}(object=%s,transfer.file=\"%s\")")
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(defun org-babel-R-evaluate
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(session body result-type result-params column-names-p row-names-p)
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"Evaluate R code in BODY."
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(if session
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(org-babel-R-evaluate-session
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session body result-type result-params column-names-p row-names-p)
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(org-babel-R-evaluate-external-process
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body result-type result-params column-names-p row-names-p)))
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(defun org-babel-R-evaluate-external-process
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(body result-type result-params column-names-p row-names-p)
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"Evaluate BODY in external R process.
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If RESULT-TYPE equals 'output then return standard output as a
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string. If RESULT-TYPE equals 'value then return the value of the
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last statement in BODY, as elisp."
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(case result-type
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(value
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(let ((tmp-file (org-babel-temp-file "R-")))
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(org-babel-eval org-babel-R-command
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(format org-babel-R-write-object-command
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(if row-names-p "TRUE" "FALSE")
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(if column-names-p
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(if row-names-p "NA" "TRUE")
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"FALSE")
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(format "{function ()\n{\n%s\n}}()" body)
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(org-babel-process-file-name tmp-file 'noquote)))
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(org-babel-R-process-value-result
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(if (or (member "scalar" result-params)
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(member "verbatim" result-params))
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(with-temp-buffer
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(insert-file-contents tmp-file)
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(buffer-string))
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(org-babel-import-elisp-from-file tmp-file '(16)))
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column-names-p)))
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(output (org-babel-eval org-babel-R-command body))))
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(defun org-babel-R-evaluate-session
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(session body result-type result-params column-names-p row-names-p)
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"Evaluate BODY in SESSION.
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If RESULT-TYPE equals 'output then return standard output as a
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string. If RESULT-TYPE equals 'value then return the value of the
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last statement in BODY, as elisp."
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(case result-type
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(value
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(with-temp-buffer
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(insert (org-babel-chomp body))
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(let ((ess-local-process-name
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(process-name (get-buffer-process session)))
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(ess-eval-visibly-p nil))
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(ess-eval-buffer nil)))
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(let ((tmp-file (org-babel-temp-file "R-")))
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(org-babel-comint-eval-invisibly-and-wait-for-file
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session tmp-file
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(format org-babel-R-write-object-command
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(if row-names-p "TRUE" "FALSE")
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(if column-names-p
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(if row-names-p "NA" "TRUE")
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"FALSE")
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".Last.value" (org-babel-process-file-name tmp-file 'noquote)))
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(org-babel-R-process-value-result
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(if (or (member "scalar" result-params)
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(member "verbatim" result-params))
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(with-temp-buffer
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(insert-file-contents tmp-file)
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(buffer-string))
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(org-babel-import-elisp-from-file tmp-file '(16)))
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column-names-p)))
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(output
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(mapconcat
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#'org-babel-chomp
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(butlast
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(delq nil
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(mapcar
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(lambda (line) (when (> (length line) 0) line))
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(mapcar
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(lambda (line) ;; cleanup extra prompts left in output
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(if (string-match
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"^\\([ ]*[>+\\.][ ]?\\)+\\([[0-9]+\\|[ ]\\)" line)
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(substring line (match-end 1))
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line))
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(org-babel-comint-with-output (session org-babel-R-eoe-output)
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(insert (mapconcat #'org-babel-chomp
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(list body org-babel-R-eoe-indicator)
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"\n"))
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(inferior-ess-send-input)))))) "\n"))))
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(defun org-babel-R-process-value-result (result column-names-p)
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"R-specific processing of return value.
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Insert hline if column names in output have been requested."
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(if column-names-p
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(cons (car result) (cons 'hline (cdr result)))
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result))
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(provide 'ob-R)
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;;; ob-R.el ends here
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