emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
blob e76b31319f342ba43766b031b1deba3205616ba2 16644 bytes (raw)
name: contrib/babel/library-of-babel.org 	 # note: path name is non-authoritative(*)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
 
#+title:    The Library of Babel
#+author:     Org-mode People
#+STARTUP:  oddeven hideblocks

* Introduction

  The Library of Babel is an extensible collection of ready-made and
  easily-shortcut-callable source-code blocks for handling common tasks.
  Org-babel comes pre-populated with the source-code blocks located in this
  file. It is possible to add source-code blocks from any org-mode file to
  the library by calling =(org-babel-lob-ingest "path/to/file.org")=.
  
  This file is included in worg mainly less for viewing through the web
  interface, and more for contribution through the worg git repository.  If
  you have code snippets that you think others may find useful please add
  them to this file and [[file:~/src/worg/worg-git.org::contribute-to-worg][contribute them]] to worg.
  
  The raw Org-mode text of this file can be downloaded at
  [[repofile:contrib/babel/library-of-babel.org][library-of-babel.org]]

* Simple

A collection of simple utility functions:

#+srcname: echo
#+begin_src emacs-lisp :var input="echo'd"
  input
#+end_src

* File I/O

** Reading and writing files

Read the contents of the file at =file=.  The =:results vector= and
=:results scalar= header arguments can be used to read the contents of
file as either a table or a string.

#+srcname: read
#+begin_src emacs-lisp :var file="" :var format=""
  (if (string= format "csv")
      (with-temp-buffer
        (org-table-import (expand-file-name file) nil)
        (org-table-to-lisp))
    (with-temp-buffer
      (insert-file-contents (expand-file-name file))
      (buffer-string)))
#+end_src

Write =data= to a file at =file=.  If =data= is a list, then write it
as a table in traditional Org-mode table syntax.

#+srcname: write
#+begin_src emacs-lisp :var data="" :var file="" :var ext='()
  (flet ((echo (r) (if (stringp r) r (format "%S" r))))
    (with-temp-file file
      (case (and (listp data)
                 (or ext (intern (file-name-extension file))))
        ('tsv (insert (orgtbl-to-tsv data '(:fmt echo))))
        ('csv (insert (orgtbl-to-csv data '(:fmt echo))))
        (t    (org-babel-insert-result data)))))
  nil
#+end_src

** Remote files

**** json

Read local or remote file in [[http://www.json.org/][json]] format into emacs-lisp objects.

#+srcname: json
#+begin_src emacs-lisp :var file='() :var url='()
  (require 'json)
  (cond
   (file
    (with-temp-filebuffer file
      (goto-char (point-min))
      (json-read)))
   (url
    (require 'w3m)
    (with-temp-buffer
      (w3m-retrieve url)
      (goto-char (point-min))
      (json-read))))
#+end_src

**** Google docs

The following code blocks make use of the [[http://code.google.com/p/googlecl/][googlecl]] Google command line
tool.  This tool provides functionality for accessing Google services
from the command line, and the following code blocks use /googlecl/
for reading from and writing to Google docs with Org-mode code blocks.

****** Read a document from Google docs

The =google= command seems to be throwing "Moved Temporarily" errors
when trying to download textual documents, but this is working fine
for spreadsheets.

#+source: gdoc-read
#+begin_src emacs-lisp :var title="example" :var format="csv"
  (let* ((file (concat title "." format))
         (cmd (format "google docs get --format %S --title %S" format title)))
    (message cmd) (message (shell-command-to-string cmd))
    (prog1 (if (string= format "csv")
               (with-temp-buffer
                 (org-table-import (shell-quote-argument file) '(4))
                 (org-table-to-lisp))
             (with-temp-buffer
               (insert-file-contents (shell-quote-argument file))
               (buffer-string)))
      (delete-file file)))
#+end_src

For example, a line like the following can be used to read the
contents of a spreadsheet named =num-cells= into a table.
: #+call: gdoc-read(title="num-cells"")

A line like the following can be used to read the contents of a
document as a string.

: #+call: gdoc-read(title="loremi", :format "txt")

****** Write a document to a Google docs

Write =data= to a google document named =title=.  If =data= is tabular
it will be saved to a spreadsheet, otherwise it will be saved as a
normal document.

#+source: gdoc-write
#+begin_src emacs-lisp :var title="babel-upload" :var data=fibs(n=10) :results silent
  (let* ((format (if (listp data) "csv" "txt"))
         (tmp-file (make-temp-file "org-babel-google-doc" nil (concat "." format)))
         (cmd (format "google docs upload --title %S %S" title tmp-file)))
    (with-temp-file tmp-file
      (insert
       (if (listp data)
           (orgtbl-to-csv
            data '(:fmt (lambda (el) (if (stringp el) el (format "%S" el)))))
         (if (stringp data) data (format "%S" data)))))
    (message cmd)
    (prog1 (shell-command-to-string cmd) (delete-file tmp-file)))
#+end_src

example usage
: #+source: fibs
: #+begin_src emacs-lisp :var n=8
:   (flet ((fib (m) (if (< m 2) 1 (+ (fib (- m 1)) (fib (- m 2))))))
:     (mapcar (lambda (el) (list el (fib el))) (number-sequence 0 (- n 1))))
: #+end_src
: 
: #+call: gdoc-write(title="fibs", data=fibs(n=10))

* Plotting code

** R

  Plot column 2 (y axis) against column 1 (x axis). Columns 3 and
  beyond, if present, are ignored.

#+srcname: R-plot(data=R-plot-example-data)
#+begin_src R
plot(data)
#+end_src

#+tblname: R-plot-example-data
| 1 |  2 |
| 2 |  4 |
| 3 |  9 |
| 4 | 16 |
| 5 | 25 |

#+lob: R-plot(data=R-plot-example-data)

#+resname: R-plot(data=R-plot-example-data)
: nil

** Gnuplot

* Org reference

** Headline references

#+source: headline
#+begin_src emacs-lisp :var headline=top :var file='()
  (save-excursion
    (when file (get-file-buffer file))
    (org-open-link-from-string (org-make-link-string headline))
    (save-restriction
      (org-narrow-to-subtree)
      (buffer-string)))
#+end_src

#+call: headline(headline="headline references")

* Tables

** LaTeX Table export

*** booktabs

This block can be used to wrap a table in the latex =booktabs=
environment, it takes the following arguments -- all but the first two
are optional.

| arg   | description                                |
|-------+--------------------------------------------|
| table | a reference to the table                   |
| align | optional alignment string                  |
| env   | optional environment, default to "tabular" |
| width | optional width specification string        |

#+srcname: booktabs
#+begin_src emacs-lisp :var table='((:head) hline (:body)) :var align='() :var env="tabular" :var width='() :noweb yes :results latex
  (flet ((to-tab (tab)
                 (orgtbl-to-generic
                  (mapcar (lambda (lis)
                            (if (listp lis)
                                (mapcar (lambda (el)
                                          (if (stringp el)
                                              el
                                            (format "%S" el))) lis)
                              lis)) tab)
                  (list :lend " \\\\" :sep " & " :hline "\\hline"))))
    (org-fill-template
     "
  \\begin{%env}%width%align
  \\toprule
  %table
  \\bottomrule
  \\end{%env}\n"
     (list
      (cons "env"       (or env "table"))
      (cons "width"     (if width (format "{%s}" width) ""))
      (cons "align"     (if align (format "{%s}" align) ""))
      (cons "table"
            ;; only use \midrule if it looks like there are column headers
            (if (equal 'hline (second table))
                (concat (to-tab (list (first table)))
                        "\n\\midrule\n"
                        (to-tab (cddr table)))
              (to-tab table))))))
#+end_src

*** Longtable

This block can be used to wrap a table in the latex =longtable=
environment, it takes the following arguments -- all but the first two
are optional.

| arg       | description                                                 |
|-----------+-------------------------------------------------------------|
| table     | a reference to the table                                    |
| align     | optional alignment string                                   |
| width     | optional width specification string                         |
| hline     | the string to use as hline separator, defaults to "\\hline" |
| head      | optional "head" string                                      |
| firsthead | optional "firsthead" string                                 |
| foot      | optional "foot" string                                      |
| lastfoot  | optional "lastfoot" string                                  |

#+srcname: longtable
#+begin_src emacs-lisp :var table='((:table)) :var align='() :var width='() :var hline="\\hline" :var firsthead='() :var head='() :var foot='() :var lastfoot='() :noweb yes :results latex
  (org-fill-template
   "
  \\begin{longtable}%width%align
  %firsthead
  %head
  %foot
  %lastfoot
  
  %table
  \\end{longtable}\n"
   (list
    (cons "width"     (if width (format "{%s}" width) ""))
    (cons "align"     (if align (format "{%s}" align) ""))
    (cons "firsthead" (if firsthead (concat firsthead "\n\\endfirsthead\n") ""))
    (cons "head"      (if head (concat head "\n\\endhead\n") ""))
    (cons "foot"      (if foot (concat foot "\n\\endfoot\n") ""))
    (cons "lastfoot"  (if lastfoot (concat lastfoot "\n\\endlastfoot\n") ""))
    (cons "table" (orgtbl-to-generic
                   (mapcar (lambda (lis)
                             (if (listp lis)
                                 (mapcar (lambda (el)
                                           (if (stringp el)
                                               el
                                             (format "%S" el))) lis)
                               lis)) table)
                   (list :lend " \\\\" :sep " & " :hline hline)))))
#+end_src

** Elegant lisp for transposing a matrix.

#+tblname: transpose-example
| 1 | 2 | 3 |
| 4 | 5 | 6 |

#+srcname: transpose
#+begin_src emacs-lisp :var table=transpose-example
  (apply #'mapcar* #'list table)
#+end_src

#+resname:
| 1 | 4 |
| 2 | 5 |
| 3 | 6 |

* Misc

** File-specific Version Control logging
   :PROPERTIES:
   :AUTHOR: Luke Crook
   :END:
   
This function will attempt to retrieve the entire commit log for the
file associated with the current buffer and insert this log into the
export. The function uses the Emacs VC commands to interface to the
local version control system, but has only been tested to work with
Git. 'limit' is currently unsupported.

#+source: vc-log
#+headers: :var limit=-1
#+headers: :var buf=(buffer-name (current-buffer))
#+begin_src emacs-lisp
  ;; Most of this code is copied from vc.el vc-print-log
  (require 'vc)
  (when (vc-find-backend-function
         (vc-backend (buffer-file-name (get-buffer buf))) 'print-log)
    (let ((limit -1)
          (vc-fileset nil)
          (backend nil)
          (files nil))
      (with-current-buffer (get-buffer buf)
        (setq vc-fileset (vc-deduce-fileset t)) ; FIXME: Why t? --Stef
        (setq backend (car vc-fileset))
        (setq files (cadr vc-fileset)))
      (with-temp-buffer 
        (let ((status (vc-call-backend
                       backend 'print-log files (current-buffer))))
          (when (and (processp status)   ; Make sure status is a process
                     (= 0 (process-exit-status status))) ; which has not terminated
            (while (not (eq 'exit (process-status status)))
              (sit-for 1 t)))
          (buffer-string)))))
#+end_src

** Trivial python code blocks

#+srcname: python-identity(a=1)
#+begin_src python
a
#+end_src

#+srcname: python-add(a=1, b=2)
#+begin_src python
a + b
#+end_src

** Arithmetic

#+source: lob-add
#+begin_src emacs-lisp :var a=0 :var b=0
  (+ a b)
#+end_src

#+source: lob-minus
#+begin_src emacs-lisp :var a=0 :var b=0
  (- a b)
#+end_src

#+source: lob-times
#+begin_src emacs-lisp :var a=0 :var b=0
  (* a b)
#+end_src

#+source: lob-div
#+begin_src emacs-lisp :var a=0 :var b=0
  (/ a b)
#+end_src

* GANTT Charts

The =elispgantt= source block was sent to the mailing list by Eric
Fraga.  It was modified slightly by Tom Dye.
 
#+source: elispgantt
#+begin_src emacs-lisp :var table=gantttest
  (let ((dates "")
        (entries (nthcdr 2 table))
        (milestones "")
        (nmilestones 0)
        (ntasks 0)
        (projecttime 0)
        (tasks "")
        (xlength 1))
    (message "Initial: %s\n" table)
    (message "Entries: %s\n" entries)
    (while entries
      (let ((entry (first entries)))
        (if (listp entry)
            (let ((id (first entry))
                  (type (nth 1 entry))
                  (label (nth 2 entry))
                  (task (nth 3 entry))
                  (dependencies (nth 4 entry))
                  (start (nth 5 entry))
                  (duration (nth 6 entry))
                  (end (nth 7 entry))
                  (alignment (nth 8 entry)))
              (if (> start projecttime) (setq projecttime start))
              (if (string= type "task")
                  (let ((end (+ start duration))
                        (textposition (+ start (/ duration 2)))
                        (flush ""))
                    (if (string= alignment "left")
                        (progn
                          (setq textposition start)
                          (setq flush "[left]"))
                      (if (string= alignment "right")
                          (progn
                            (setq textposition end)
                            (setq flush "[right]"))))
                    (setq tasks
                          (format "%s  \\gantttask{%s}{%s}{%d}{%d}{%d}{%s}\n"
                                  tasks label task start end textposition flush))
                    (setq ntasks (+ 1 ntasks))
                    (if (> end projecttime)
                        (setq projecttime end)))
                (if (string= type "milestone")
                    (progn
                      (setq milestones
                            (format
                             "%s  \\ganttmilestone{$\\begin{array}{c}\\mbox{%s}\\\\ \\mbox{%s}\\end{array}$}{%d}\n"
                             milestones label task start))
                      (setq nmilestones (+ 1 nmilestones)))
                  (if (string= type "date")
                      (setq dates (format "%s  \\ganttdateline{%s}{%d}\n"
                                          dates label start))
                    (message "Ignoring entry with type %s\n" type)))))
          (message "Ignoring non-list entry %s\n" entry)) ; end if list entry
        (setq entries (cdr entries))))  ; end while entries left
    (format "\\pgfdeclarelayer{background}
  \\pgfdeclarelayer{foreground}
  \\pgfsetlayers{background,foreground}
  \\renewcommand{\\ganttprojecttime}{%d}
  \\renewcommand{\\ganttntasks}{%d}
  \\noindent
  \\begin{tikzpicture}[y=-0.75cm,x=0.75\\textwidth]
    \\begin{pgfonlayer}{background}
      \\draw[very thin, red!10!white] (0,1+\\ganttntasks) grid [ystep=0.75cm,xstep=1/\\ganttprojecttime] (1,0);
      \\draw[\\ganttdatelinecolour] (0,0) -- (1,0);
      \\draw[\\ganttdatelinecolour] (0,1+\\ganttntasks) -- (1,1+\\ganttntasks);
    \\end{pgfonlayer}
  %s
  %s
  %s
  \\end{tikzpicture}" projecttime ntasks tasks milestones dates))
#+end_src

* Available languages
  :PROPERTIES:
  :AUTHOR:   Bastien
  :END:

** From Org's core

| Language   | Identifier | Language       | Identifier |
|------------+------------+----------------+------------|
| Asymptote  | asymptote  | Awk            | awk        |
| Emacs Calc | calc       | C              | C          |
| C++        | C++        | Clojure        | clojure    |
| CSS        | css        | ditaa          | ditaa      |
| Graphviz   | dot        | Emacs Lisp     | emacs-lisp |
| gnuplot    | gnuplot    | Haskell        | haskell    |
| Javascript | js         | LaTeX          | latex      |
| Ledger     | ledger     | Lisp           | lisp       |
| Lilypond   | lilypond   | MATLAB         | matlab     |
| Mscgen     | mscgen     | Objective Caml | ocaml      |
| Octave     | octave     | Org-mode       | org        |
|            |            | Perl           | perl       |
| Plantuml   | plantuml   | Python         | python     |
| R          | R          | Ruby           | ruby       |
| Sass       | sass       | Scheme         | scheme     |
| GNU Screen | screen     | shell          | sh         |
| SQL        | sql        | SQLite         | sqlite     |

** From Org's contrib/babel/langs

- ob-oz.el, by Torsten Anders and Eric Schulte 
- ob-fomus.el, by Torsten Anders

debug log:

solving e76b313 ...
found e76b313 in https://git.savannah.gnu.org/cgit/emacs/org-mode.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).