CentOS - Oct 2007 - Conversion of text in shell

Hi! I want to convert the lines
1.1,3.19e-4
1.2,3.05e-3
10.5,9.14e8
(as example)

to

1,1 & $3,19 \cdot 10^{-4}$\\
etc.. from one file and save these in a new file
Rly lost here except I know I should use regexp and MAYBE sed somehow :)
Thx for any help
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On Fri, October 12, 2007 4:54 pm, roland hellstr?m
wrote:
>
> Hi! I want to convert the lines
> 1.1,3.19e-4
> 1.2,3.05e-3
> 10.5,9.14e8
> (as example)
>
> to
>
> 1,1 & $3,19 \cdot 10^{-4}$\\
> etc.. from one file and save these in a new file
> Rly lost here except I know I should use regexp and MAYBE sed somehow :)
> Thx for any help
Assuming that you have those lines in a file called numbers.txt, you can
execute the following (all on one line):

cat numbers.txt | tr '.,e' ',^^' | awk -F^ '{printf("%s
& $%s \\cdot
10^{%s}$\\\\\n", $1, $2, $3);}'

The output will be:

1,1 & $3,19 \cdot 10^{-4}$\\
1,2 & $3,05 \cdot 10^{-3}$\\
10,5 & $9,14 \cdot 10^{8}$\\

Not the most elegant solution, but it works.  I hope this is what you were
looking for.

As it turns out this was a CS class exercise in using sed and regex.

And excuse me, but you ARE using regular expressions in your example...

-Ross


-----Original Message-----
From: centos-bounces at centos.org <centos-bounces at centos.org>
To: CentOS mailing list <centos at centos.org>
Sent: Mon Oct 15 17:07:11 2007
Subject: Re: [CentOS] Conversion of text in shell

Ross S. W. Walker wrote:
> Ross S. W. Walker wrote:
>> roland hellstr?m wrote:
>>> OK! I finally figured out the solution for all you people out 
>>> the eager to hear it!!!
>>> it was infact very very similar to the last line I sent... 
>> this is it
>>> sed 's/\([^\.]*\).\([^,]*\),\([^\.]*\).\([^e]*\)e\(.*\)/\1,\2 
>>> \& $\3,\4 \\cdot 10^{\5}$\\\\/'
>>>
>>> omg I feel so h4xx0r figuring that out myself lol
>>> Thx for the help all :)
>> I am surprised you got it all in 1 regex, I was aiming more for:
>>
>> sed 's/,/ & /;s/\./,/;s/\(.*\)e\(.*\)/\1 \\cdot 10^{\2}/'
> 
> whoops, I made a mistake:
> 
> sed 's/,/ \& /;s/\./,/g;s/\(.*\)e\(.*\)/\1 \\cdot
10^{\2}\$\\\\/'
> 
> You need the 'g' option in the second substitute to perform a
> global, and of course the proper cdot expression.
> 
you don't need regex:

sed \
	-e '/^ *$/d' \
	-e 's/,/ \& $/' \
	-e 's/\./,/g'  \
	-e 's/e/ \\cdot 10^{/' -e s'/$/}$\\\\/' \
		/path/to/input/file

now, the exercice is to read the input file directly with LaTeX using
TeX macros instead of converting it.

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Ross S. W. Walker wrote:
> As it turns out this was a CS class exercise in using sed and regex.
> 
> And excuse me, but you ARE using regular expressions in your example...
> 
very true indeed... time to go to bed ;-p