Substituting comma "," for dot "." in a specific column when comma"," is a delimiter Post: 302651479

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Top Forums Shell Programming and Scripting Substituting comma "," for dot "." in a specific column when comma"," is a delimiter Post 302651479 by ddreggors on Tuesday 5th of June 2012 02:46:02 PM

06-05-2012

Registered User

@Scrutinizer:
Very nice!

I had come up with a similar sed command but not nearly as elegant.

Code:

$ sed -r 's/([0-9]+),([0-9]+),([0-9]+),/\1,\2.\3,/g' ./text.txt 
('BLABLA +200-GRS','Serviç','TarifaçServiç,'wap.bla.us.0000000121',2985,0.55,' de conversãem escada','Dia','Domingos')
('BLABLA +200-GRR','Serviç','TarifaçServiç,'wap.bla.us.0000000121',2985,0.55,' de conversãem escada','Reduzido','Sádos')
('BLABLA 45-GPR','Serviç','TarifaçServiç,'canais.bla.us.0000000222',3073,0,' de conversãde diferenç,'Noite','Sádos')
('BLABLA 45-GPR','Serviç','TarifaçServiç,'canais.bla.us.0000000222',3073,0,' de conversãde diferenç,'Noite','Segunda - Sexta')
('BLABLA 35-GMS','Serviç,'TarifaçServiç,'VC3 XXXX YYY-Fixo TIM(on)',3121,1.21,' de conversãem escada','Noite','Segunda - Sexta')
('BLABLA-GRN','Serviç,'TarifaçServiç,'Chamadas',1362,1.961,' de conversãem escada','Noite','Segunda - Sexta')
('BLABLA-GPE','Serviç,'TarifaçServiç,'Chamadas',1362,1.9897,' de conversãem escada','Dia Todo','Domingos')

Mine matches on (and keeps) 3 consecutive number columns and replaces the comma for a period in the appropriate place when found.

You approach is very similar but far more compact and elegant.

Correct me if I am wrong, but I will try to explain for those that do not understand that sed command.

The match side of the command matches on any text that starts with a comma and *does not* have a single quote after it. Since numbers are not contained in single quotes it will only ever match (and keep) the number fields.

Next he tells the replace side of the sed command to replace the comma and number with a period and number, but only on the 3rd match.

so in plain text:

,11,22,33 would become ,11,22.33 as the first and second commas are left as is!

ddreggors

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LEARN ABOUT MOJAVE

colrm

COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME

     colrm -- remove columns from a file

SYNOPSIS

     colrm [start [stop]]

DESCRIPTION

     The colrm utility removes selected columns from the lines of a file.  A column is defined as a single character in a line.  Input is read
     from the standard input.  Output is written to the standard output.

     If only the start column is specified, columns numbered less than the start column will be written.  If both start and stop columns are spec-
     ified, columns numbered less than the start column or greater than the stop column will be written.  Column numbering starts with one, not
     zero.

     Tab characters increment the column count to the next multiple of eight.  Backspace characters decrement the column count by one.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7).

EXIT STATUS

     The colrm utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     awk(1), column(1), cut(1), paste(1)

HISTORY

     The colrm command appeared in 3.0BSD.

BSD
								  August 4, 2004							       BSD