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Old 04-21-2010, 11:13 AM   #1
Alkass
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sed including symbol


Hi again!

I have a file with lines like

268.903 1.893(ab)
270.01 2.6(fb)

what I want to do is

1-sed and if (ab) is found, replace (ab) AND with E10-6
2-sed and if (fb) is found replace (fb) AND with E10-3

so output looks like

268.903E10-6 1.893E10-6
270.01E10-3 2.6E10-3

I have problem replacing the symbol correctly....

Thanks in advance!
A
 
Old 04-21-2010, 02:30 PM   #2
colucix
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What have you tried so far? GNU sed can replace hexadecimal values, so that the problem could be reduced to identify the correct hex sequence to match the symbol (od or hexdump might come in handy).
 
Old 04-21-2010, 03:22 PM   #3
pixellany
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According to hexdump, the symbol is 0xc2 + 0xb1. I cannot find it in the unicode tables,

I found various hints that Gnu SED will recognize unicode, but no concrete examples.

Regardless, this works: (I put the 2 sample lines into a file named "hex")
Code:
[mherring@mystical play]$ more hex
268.903 1.893(ab)
270.01 2.6(fb)
[mherring@mystical play]$ sed 's/\xc2\xb1/here/' hex
268.903here 1.893(ab)
270.01here 2.6(fb)
 
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Old 04-22-2010, 01:38 AM   #4
Dan04
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Quote:
Originally Posted by pixellany View Post
According to hexdump, the symbol is 0xc2 + 0xb1. I cannot find it in the unicode tables
C2 B1 is the UTF-8 encoding of the character U+00B1, which is indeed the sign.-
 
Old 04-22-2010, 02:59 AM   #5
colucix
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Quote:
Originally Posted by Dan04 View Post
C2 B1 is the UTF-8 encoding of the character U+00B1, which is indeed the sign.-
Good to know. I've just found a complete UTF-8 character set online, here.

An off-topic note: Gnome terminal (and maybe many others) supports UTF-8 typing: we have to press simultaneously Ctrl-Shft, type u followed by the Unicode number, release Ctrl-Shift and the UTF-8 character appears. Even the LQ Reply box in Firefox supports it... ♥
 
  


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