Re: text substitution in a colum

sed "s/\(\t\)\([0-9]\)/\1MY_\2/g"

This seems to do what you want.

Joel



On Mon, 2012-11-26 at 15:05 +0100, MOKRANI Rachid wrote:
>   
> Hi,
> 
> This is my firts port.
> 
> I have a file with colum like this.
> 
> Title1 Title2 Title3 Title4
> AA B 66 D
> BB DS 7 TT
> VS FDSE 53 TGF
> BG F 5 GF 
> 
> I would like to have with a sed command the following result. Add the
> character MY_ before all numbers in the colum number 3 and preserve
> the
> title "Title3". All the colums are seaprate by a tab.
> 
> Title1 Title2 Title3 Title4
> AA B MY_66 D
> BB DS MY_7 TT
> VS FDSE MY_53 TGF
> BG F MY_5 GF 
> 
> 
> 
> Many thanks for your help/example.
> 
> Regards.
> 
> __________________________ 
> Avant d'imprimer, pensez à l'environnement ! Please consider the
> environment before printing ! 
> Ce message et toutes ses pièces jointes sont confidentiels et établis
> à l'intention exclusive de ses destinataires. Toute utilisation non
> conforme à sa destination, toute diffusion ou toute publication,
> totale ou partielle, est interdite, sauf autorisation expresse. IFP
> Energies nouvelles décline toute responsabilité au titre de ce
> message. This message and any attachments are confidential and
> intended solely for the addressees. Any unauthorised use or
> dissemination is prohibited. IFP Energies nouvelles should not be
> liable for this message. 
> __________________________
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 
>