Editing Tips and tricks

Jump to navigation Jump to search

Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision Your text
Line 24: Line 24:
  
 
This is a list of tiny helper functions (the equivalent of e.g., shell aliases), the kind one would have on its {{Path|.octaverc}} file.
 
This is a list of tiny helper functions (the equivalent of e.g., shell aliases), the kind one would have on its {{Path|.octaverc}} file.
 
=== Reload 'octave.rc' after 'clear' ===
 
When using {{Codeline|clear}}, one may accidentally remove functions (alias) or other variables set on the {{Path|octave.rc}} file. This can fixed by shadowing the {{Codeline|clear}} function with the following:
 
 
{{Code|reload octave.rc after clear|<pre>
 
function clear (varargin)
 
  args = sprintf (', "%s"', varargin{:});
 
  evalin ("caller", ['builtin ("clear"' args ')']);
 
  source ("~/.octaverc");
 
endfunction</pre>}}
 
 
The problem with this approach is if there's path manipulation on the {{Path|octave.rc}} file, such as {{Codeline|addpath}}. A workaround is needed for each case since it is not possible to obtain a reliable list of what's in Octave load path. But basically should be to undo what the file does, before {{Codeline|source ("~/.octaverc")}}.
 
 
If there's a {{Codeline|pkg unload all}} on it, this would also unload all packages. The following adjustment will keep the packages loaded
 
 
{{Code|reload octave.rc after clear but keep packages loaded|<pre>
 
function clear (varargin)
 
  args = sprintf (', "%s"', varargin{:});
 
  evalin ("caller", ['builtin ("clear"' args ')']);
 
  pkglist = pkg ("list");
 
  loadedpkg = cell (0);
 
  for ii = 1:numel (pkglist)
 
    if (pkglist{ii}.loaded)
 
      loadedpkg{end+1} = pkglist{ii}.name;
 
    endif
 
  endfor
 
  source ("~/.octaverc");
 
  if (numel (loadedpkg) != 0)
 
    pkg ("load", loadedpkg{:});
 
  endif
 
endfunction</pre>}}
 
 
  
 
=== replace help with man ===
 
=== replace help with man ===

Please note that all contributions to Octave may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see Octave:Copyrights for details). Do not submit copyrighted work without permission!

To edit this page, please answer the question that appears below (more info):

Cancel Editing help (opens in new window)

Templates used on this page: