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Hi folks,
I have a file which has 9 column. I want to replace A by RA in 4th column. Remember there are A in 8th column also. I only want to replace A by RA in 4th column. How can I do it? Please...

thanks..it works smoothly

Hello Guys,
I have written the following script to do certain job. I have more than 300 files, all are .pdb & .out files. and the files are (1,3,5,7,11,13,15,17,21,.......787,791,793,795).pdb...

thaks!! it works!!

thaks aigles! it works fine. only problem is the columns are not properly alined.

Hello guys,
I have a file look this. I have just posted a segment of it. I want to replace "PW" from 4th column by TRP. How do I do it? Pls help.
thanks advance
parimal

ATOM 2817 HB3 GLU...

Guys,
The two files look like this:

101.pdb looks like:

AM1 CALCULATION

LocalSCF2 1.0
...

Hi,
I need your help guys. I have two data files, namely 101.amberized.pdb & 101.pdb .

Now I want to replace the whole 3rd column of 101.amberized.pdb with the 3rd column of 101.pdb file. How...