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Wrap verbatim examples in @example ... @end example
Note that there are some cases where the #+begin_src itself is part of the example, and others where only the body of the source block is the example.
This commit is contained in:
Dan Davison
parent
3cfe6d565b
commit
dbcd54f16f
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@ -8,10 +8,11 @@
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@subsection Source Code Block
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The basic syntax of source code blocks in Org-babel is as follows:
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: #+begin_src language header-arguments
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: body
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: #+end_src
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@example
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#+begin_src language header-arguments
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body
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#+end_src
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@end example
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- language :: The language of the code in the source code block. Valid
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values must be members of =org-babel-interpreters=.
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- header-arguments :: Header arguments control many facets of the
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@ -26,10 +27,12 @@ The basic syntax of source code blocks in Org-babel is as follows:
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This syntax can be expanded by naming the source code block.
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: #+source: name
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: #+begin_src language header-arguments
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:
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: #+end_src
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@example
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#+sourcename
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#+begin_src language header-arguments
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body
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#+end_src
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@end example
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- name :: This name is associated with the source code block. This is
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similar to the =#+tblname= lines that can be used to name tables
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@ -42,33 +45,35 @@ This syntax can be expanded by naming the source code block.
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@subsection Library of Babel
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[[file:library-of-babel.org][Library of Babel]] functions can be called using the following syntax.
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: #+lob: R-plot(data=R-plot-example-data)
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@example
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#+lob: R-plot(data=R-plot-example-data)
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@end example
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@subsection Aliases
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Keyword aliases are intended to make Org-babel feel natural to
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programmers fluent in a variety of languages. For example,
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#+begin_example
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,#+srcname: alias-example
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,#+begin_src emacs-lisp
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@example
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#+srcname: alias-example
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#+begin_src emacs-lisp
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'((call lob)
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(source function srcname)
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(results resname))
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,#+end_src
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#+end_src
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,#+results: alias-example
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#+results: alias-example
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| call | lob | |
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| source | function | srcname |
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| results | resname | |
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#+end_example
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@end example
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- =#+srcname:= can be replaced with either of two aliases, =#+source:= or =#+function:=.
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- =#+results:= can be replaced with its alias, =#+resname:=.
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When calling Library of Babel functions, as in the following
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example, there are two acceptable keywords. The =#+lob= call in
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the example could be replaced with its alias, =#+call=.
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#+begin_example
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,#+lob: R-plot(data=R-plot-example-data)
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#+end_example
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@example
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#+lob: R-plot(data=R-plot-example-data)
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@end example
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@section Languages
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:PROPERTIES:
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@ -107,9 +112,9 @@ This syntax can be expanded by naming the source code block.
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are met, then add a line like the following to your Emacs
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configuration, (replace "identifier" with one of the
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entries in the Identifier column of the table).
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#+begin_src emacs-lisp
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@example
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(require 'org-babel-identifier)
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#+end_src
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@end example
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@section Header Arguments
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:PROPERTIES:
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@ -133,7 +138,7 @@ each more specific than the last.
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System-wide values of header arguments can be specified by
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customizing the =org-babel-default-header-args= variable:
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#+begin_example
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@example
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org-babel-default-header-args is a variable defined in `org-babel.el'.
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Its value is
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((:session . "none")
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@ -145,16 +150,16 @@ each more specific than the last.
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Documentation:
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Default arguments to use when evaluating a source block.
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#+end_example
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@end example
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[[#default-noweb]]
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For example, the following example could be used to set the default value
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of =:noweb= header arguments to =yes=. This would have the effect of
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expanding =:noweb= references by default when evaluating source code blocks.
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#+begin_src emacs-lisp :results silent :exports code
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@example
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(setq org-babel-default-header-args
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(cons '(:noweb . "yes")
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(assq-delete-all :noweb org-babel-default-header-args)))
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#+end_src
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@end example
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*** Org-mode Properties
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@ -162,13 +167,13 @@ each more specific than the last.
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means they can be set on the outline header level. For example, the
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value of the =:cache= header argument will default to true in all
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source code blocks under the following example of an Org-mode outline header:
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#+begin_example
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,* outline header
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@example
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* outline header
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:PROPERTIES:
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:cache: yes
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:CUSTOM_ID: property-set-header-arguments
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:END:
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#+end_example
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@end example
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Properties defined in this way override the properties set in
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=org-babel-default-header-args=. It is convenient to use the
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=org-set-property= function bound to =C-c C-x p= to set properties
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@ -189,13 +194,13 @@ each more specific than the last.
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header argument is set to =code=, meaning only the body of the
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source code block
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will be preserved on export to HTML or LaTeX.
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#+begin_example
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,#+source: factorial
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,#+begin_src haskell :results silent :exports code
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@example
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#+source: factorial
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#+begin_src haskell :results silent :exports code
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fac 0 = 1
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fac n = n * fac (n-1)
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,#+end_src
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#+end_example
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#+end_src
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@end example
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@subsection Specific Header Arguments
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:PROPERTIES:
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@ -223,64 +228,64 @@ each more specific than the last.
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The following syntax is used to pass arguments to source code
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blocks using the =:var= header argument.
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#+begin_example
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@example
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:var name=assign
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#+end_example
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@end example
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where =assign= can take one of the following forms
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- literal value :: either a string ="string"= or a number =9=.
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- reference :: a table name:
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#+begin_example
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,#+tblname: example-table
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@example
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#+tblname: example-table
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| 1 |
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| 2 |
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| 3 |
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| 4 |
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,#+source: table-length
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,#+begin_src emacs-lisp :var table=example-table
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#+source: table-length
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#+begin_src emacs-lisp :var table=example-table
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(length table)
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,#+end_src
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#+end_src
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,#+results: table-length
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#+results: table-length
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: 4
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#+end_example
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@end example
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a source code block name, as assigned by =#+srcname:=,
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followed by parentheses:
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#+begin_example
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,#+begin_src emacs-lisp :var length=table-length()
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@example
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#+begin_src emacs-lisp :var length=table-length()
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(* 2 length)
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,#+end_src
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#+end_src
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,#+results:
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#+results:
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: 8
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#+end_example
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@end example
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In addition, an argument can be passed to the source code
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block referenced by =:var=. The argument is passed within
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the parentheses following the source code block name:
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#+begin_example
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,#+source: double
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,#+begin_src emacs-lisp :var input=8
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@example
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#+source: double
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#+begin_src emacs-lisp :var input=8
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(* 2 input)
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,#+end_src
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#+end_src
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,#+results: double
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#+results: double
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: 16
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,#+source: squared
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,#+begin_src emacs-lisp :var input=double(input=1)
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#+source: squared
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#+begin_src emacs-lisp :var input=double(input=1)
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(* input input)
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,#+end_src
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#+end_src
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,#+results: squared
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#+results: squared
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: 4
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#+end_example
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@end example
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**** alternate argument syntax
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:PROPERTIES:
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@ -291,12 +296,12 @@ each more specific than the last.
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natural way using the =#+source:= line of a source code block.
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As in the following example arguments can be packed inside of
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parenthesis following the source name.
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#+begin_example
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,#+source: double(input=0)
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,#+begin_src emacs-lisp
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@example
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#+source: double(input=0)
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#+begin_src emacs-lisp
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(* 2 input)
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,#+end_src
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#+end_example
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#+end_src
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@end example
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**** indexable variable values
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:PROPERTIES:
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@ -308,9 +313,9 @@ each more specific than the last.
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assigns the second and third rows of the table
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=example-table= to the variable =data=:
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#+begin_example
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@example
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:var data=example-table[1:2]
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#+end_example
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@end example
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*Note:* ranges are indexed using the =:= operator.
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@ -319,9 +324,9 @@ each more specific than the last.
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The following example assigns the second column of the
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first row of =example-table= to =data=:
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#+begin_example
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@example
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:var data=example-table[0,1]
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#+end_example
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@end example
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It is possible to index into the results of source code blocks
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as well as tables. Any number of dimensions can be indexed.
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@ -330,7 +335,7 @@ each more specific than the last.
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For more information on indexing behavior see the documentation
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for the =org-babel-ref-index-list= function -- provided below.
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#+begin_example
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@example
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org-babel-ref-index-list is a Lisp function in `org-babel-ref.el'.
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(org-babel-ref-index-list INDEX LIS)
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@ -340,7 +345,7 @@ each more specific than the last.
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next deepest nesting or dimension. A valid PORTION can consist
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of either an integer index, or two integers separated by a : in
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which case the entire range is returned.
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#+end_example
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@end example
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*Note:* In Emacs, the documentation for any function or variable
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can be read using the =describe-function= (M-x describe
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@ -468,22 +473,22 @@ each more specific than the last.
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In other words, if you want your plot to go into a folder called
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Work in your home directory, you could use
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#+begin_example
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,#+begin_src R :file myplot.png :dir ~/Work
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@example
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#+begin_src R :file myplot.png :dir ~/Work
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matplot(matrix(rnorm(100), 10), type="l")
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,#+end_src
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#+end_example
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#+end_src
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@end example
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**** Remote execution
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A directory on a remote machine can be specified using [[http://www.gnu.org/software/tramp/#Filename-Syntax][tramp
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filename syntax]], in which case the code will be executed on the
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remote machine[fn:2]. An example is
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#+begin_example
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,#+begin_src R :file plot.png :dir /dand@@yakuba.princeton.edu:
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@example
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#+begin_src R :file plot.png :dir /dand@@yakuba.princeton.edu:
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plot(1:10, main=system("hostname", intern=TRUE))
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,#+end_src
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#+end_example
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#+end_src
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@end example
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Text results will be returned to the local org buffer as normal, and
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file output will be created on the remote machine with relative paths
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@ -493,9 +498,9 @@ remote file will be created.
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So in the above example a plot will be created on the remote machine,
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and a link of the following form will be inserted in the org buffer:
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#+begin_example
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@example
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[[file:/scp:dand@@yakuba.princeton.edu:/home/dand/plot.png][plot.png]]
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#+end_example
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@end example
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Most of this functionality follows immediately from the fact that
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=:dir= sets the value of the emacs variable =default-directory=,
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@ -591,17 +596,17 @@ above features to work correctly.
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This source code block:
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#+begin_example
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@example
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-- <<example>>
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#+end_example
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@end example
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expands to:
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#+begin_example
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@example
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-- this is the
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-- multi-line body of example
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#+end_example
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@end example
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Note that noweb replacement text that does *not* contain any
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newlines will not be affected by this change, so it is still
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@ -683,6 +688,7 @@ above features to work correctly.
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non-interactive interpreter running as an external process. For
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example, compare the following two blocks:
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@example
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#+begin_src python :results output
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print "hello"
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2
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@ -692,9 +698,10 @@ above features to work correctly.
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#+resname:
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: hello
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: bye
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@end example
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In non-session mode, the '2' is not printed and does not appear.
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@example
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#+begin_src python :results output :session
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print "hello"
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2
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@ -705,6 +712,7 @@ above features to work correctly.
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: hello
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: 2
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: bye
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@end example
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But in =:session= mode, the interactive interpreter receives input '2'
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and prints out its value, '2'. (Indeed, the other print statements are
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@ -776,7 +784,7 @@ above features to work correctly.
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:CUSTOM_ID: function-org-babel-execute-src-block
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:END:
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#+begin_example
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@example
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org-babel-execute-src-block is an interactive Lisp function in
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`org-babel.el'.
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@ -793,14 +801,14 @@ above features to work correctly.
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Optionally supply a value for PARAMS which will be merged with
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the header arguments specified at the front of the source code
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block.
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#+end_example
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@end example
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*** org-babel-open-src-block-result
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:PROPERTIES:
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:CUSTOM_ID: function-org-babel-open-src-block-result
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:END:
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#+begin_example
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@example
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org-babel-open-src-block-result is an interactive Lisp function in
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`org-babel.el'.
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@ -810,14 +818,14 @@ above features to work correctly.
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source code block, otherwise return nil. With optional prefix
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argument RE-RUN the source-code block is evaluated even if
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results already exist.
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#+end_example
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@end example
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*** org-babel-load-in-session
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:PROPERTIES:
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:CUSTOM_ID: function-org-babel-load-in-session
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:END:
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#+begin_example
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@example
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org-babel-load-in-session is an interactive Lisp function in
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`org-babel.el'.
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@ -828,14 +836,14 @@ above features to work correctly.
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session. After loading the body this pops open the session.
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[back]
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#+end_example
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@end example
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*** org-babel-pop-to-session
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:PROPERTIES:
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:CUSTOM_ID: function-org-babel-pop-to-session
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:END:
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#+begin_example
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@example
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org-babel-pop-to-session is an interactive Lisp function in
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`org-babel.el'.
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@ -847,14 +855,14 @@ above features to work correctly.
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of the source block to the kill ring.
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[back]
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#+end_example
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@end example
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*** org-babel-tangle
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:PROPERTIES:
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:CUSTOM_ID: function-org-babel-tangle
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:END:
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#+begin_example
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@example
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org-babel-tangle is an interactive Lisp function in
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`org-babel-tangle.el'.
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@ -867,14 +875,14 @@ above features to work correctly.
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TARGET-FILE can be used to specify a default export file for all
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source blocks. Optional argument LANG can be used to limit the
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exported source code blocks by language.
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#+end_example
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@end example
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*** org-babel-execute-subtree
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:PROPERTIES:
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:CUSTOM_ID: function-org-babel-execute-subtree
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:END:
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#+begin_example
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@example
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org-babel-execute-subtree is an interactive Lisp function in
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`org-babel.el'.
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@ -883,14 +891,14 @@ above features to work correctly.
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(org-babel-execute-subtree &optional ARG)
|
||||
|
||||
Replace EVAL snippets in the entire subtree.
|
||||
#+end_example
|
||||
@end example
|
||||
|
||||
*** org-babel-execute-buffer
|
||||
:PROPERTIES:
|
||||
:CUSTOM_ID: function-org-babel-execute-buffer
|
||||
:END:
|
||||
|
||||
#+begin_example
|
||||
@example
|
||||
org-babel-execute-buffer is an interactive Lisp function in
|
||||
`org-babel.el'.
|
||||
|
||||
|
|
@ -899,14 +907,14 @@ above features to work correctly.
|
|||
(org-babel-execute-buffer &optional ARG)
|
||||
|
||||
Replace EVAL snippets in the entire buffer.
|
||||
#+end_example
|
||||
@end example
|
||||
|
||||
*** org-babel-sha1-hash
|
||||
:PROPERTIES:
|
||||
:CUSTOM_ID: function-org-babel-sha1-hash
|
||||
:END:
|
||||
|
||||
#+begin_example
|
||||
@example
|
||||
org-babel-sha1-hash is an interactive Lisp function in `org-babel.el'.
|
||||
|
||||
It is bound to C-c M-b h.
|
||||
|
|
@ -914,14 +922,14 @@ above features to work correctly.
|
|||
(org-babel-sha1-hash &optional INFO)
|
||||
|
||||
Not documented.
|
||||
#+end_example
|
||||
@end example
|
||||
|
||||
*** org-babel-goto-named-source-block
|
||||
:PROPERTIES:
|
||||
:CUSTOM_ID: function-org-babel-goto-named-source-block
|
||||
:END:
|
||||
|
||||
#+begin_example
|
||||
@example
|
||||
org-babel-goto-named-source-block is an interactive Lisp function in
|
||||
`org-babel.el'.
|
||||
|
||||
|
|
@ -930,14 +938,14 @@ above features to work correctly.
|
|||
(org-babel-goto-named-source-block &optional NAME)
|
||||
|
||||
Go to a named source-code block.
|
||||
#+end_example
|
||||
@end example
|
||||
|
||||
*** org-babel-lob-ingest
|
||||
:PROPERTIES:
|
||||
:CUSTOM_ID: function-org-babel-lob-ingest
|
||||
:END:
|
||||
|
||||
#+begin_example
|
||||
@example
|
||||
org-babel-lob-ingest is an interactive Lisp function in
|
||||
`org-babel-lob.el'.
|
||||
|
||||
|
|
@ -946,7 +954,7 @@ above features to work correctly.
|
|||
(org-babel-lob-ingest &optional FILE)
|
||||
|
||||
Add all source-blocks defined in FILE to `org-babel-library-of-babel'.
|
||||
#+end_example
|
||||
@end example
|
||||
|
||||
@section Batch Execution
|
||||
It is possible to call Org-babel functions from the command line.
|
||||
|
|
@ -954,7 +962,7 @@ This shell script calls [[function-org-babel-tangle][org-babel-tangle]] on every
|
|||
arguments.
|
||||
|
||||
Be sure to adjust the paths to fit your system.
|
||||
#+begin_src sh
|
||||
@example
|
||||
#!/bin/sh
|
||||
# -*- mode: shell-script -*-
|
||||
#
|
||||
|
|
@ -977,7 +985,7 @@ Be sure to adjust the paths to fit your system.
|
|||
(find-file (expand-file-name file \"$DIR\"))
|
||||
(org-babel-tangle)
|
||||
(kill-buffer)) '($FILES)))"
|
||||
#+end_src
|
||||
@end example
|
||||
|
||||
@section Footnotes
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue