[PLUG] 2013-05-21 PLUG W follow-up

[JP Vossen <jp@jpsdomain.org>]

Thanks to Walt for an interesting look at NumPy and SciPy.


We also talked about formatting output from bash scripts.  I suggested 
plain old 'echo' or 'printf' commands.  Note that 'printf' is POSIX but 
'echo' is not, and 'echo' *does* behave differently by default on 
various different systems.  E.g. on some systems "\n" is expanded to a 
newline while on others (like Linux) you need to use 'echo -e' (but see 
"xpg_echo" as well [1]).  Or you can output tab delimited or CSV output 
and import into a spreadsheet.  Someone also mentioned the 'fmt' 
command, which can be useful.  The 'fmt' and possibly 'column', 'colrm', 
'awk' and 'cut' commands may also be of interest.  When I know I'm going 
right into a spreadsheet though, I just do tab delimited output like 
'echo -e "Foo\tBar\tbaz"'.  It's really easy...
	

At dinner, among other things, we talked about logging using 'screen'. 
The simplest use is just 'screen -L' which will create 'screenlog.*' in 
your home dir.  You can pass a "logfile" or "log (on|off)" commands 
manually, in an rc file or via 'screen -X' while inside screen.  I 
talked about that in the _bash Cookbook_ recipe 17.6 "Logging and Entire 
Session or Batch Job."


Later,
JP
___________________________________________________
Footnote:

[1] For bash docs in general and "xpg_echo" per above in particular, 
start at http://www.bashcookbook.com/bashinfo/ then look for "The bash 
Reference Guide" for your bash version, e.g., 
http://www.bashcookbook.com/bashinfo/source/bash-4.2/doc/bashref.html.

----------------------------|:::======|-------------------------------
JP Vossen, CISSP            |:::======|      http://bashcookbook.com/
My Account, My Opinions     |=========|      http://www.jpsdomain.org/
----------------------------|=========|-------------------------------
"Microsoft Tax" = the additional hardware & yearly fees for the add-on
software required to protect Windows from its own poorly designed and
implemented self, while the overhead incidentally flattens Moore's Law.
___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug