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Top Forums UNIX for Dummies Questions & Answers Filling a tab-separated file with known missing entries in columns Post 302621361 by TheTransporter on Tuesday 10th of April 2012 09:42:31 AM
Old 04-10-2012
Filling a tab-separated file with known missing entries in columns

Hello all,

I have a file which is tab separated like that:


Code:
PHE_205_A    TIP_127_W    ARG_150_B
MET_1150_A    TIP_12_W    VAL_11_B
GLU_60_A    TIP_130_W    ARG_143_B
LEU_1033_A    TIP_203_W    ARG_14_B
SER_1092_A    TIP_203_W    
THR_1090_A    TIP_203_W    
SER_1092_A    TIP_25_W    SER_104_B
TYR_15_B    TIP_25_W    
ASP_61_A    TIP_34_W    THR_134_B
SER_1204_A    TIP_46_W    ASP_8_B
ASP_61_A    TIP_63_W    ARG_131_B
THR_90_A    TIP_76_W    TYR_49_B
THR_1090_A    TIP_91_W    SER_100_B


and I want it to be like that:
Code:
PHE_205_A    TIP_127_W    ARG_150_B
MET_1150_A    TIP_12_W    VAL_11_B
GLU_60_A    TIP_130_W    ARG_143_B
LEU_1033_A    TIP_203_W    ARG_14_B
SER_1092_A    TIP_203_W    ARG_14_B
THR_1090_A    TIP_203_W    ARG_14_B
SER_1092_A    TIP_25_W    SER_104_B
SER_1092_A    TIP_25_W    TYR_15_B   
ASP_61_A    TIP_34_W    THR_134_B
SER_1204_A    TIP_46_W    ASP_8_B
ASP_61_A    TIP_63_W    ARG_131_B
THR_90_A    TIP_76_W    TYR_49_B
THR_1090_A    TIP_91_W    SER_100_B

The missing entry is always the one found in the line before it (if it is _B, then it is always _B, similar is for _A)

I would really appreciate if somebody would give me an idea on how to re-format it....

Thanks!

Moderator's Comments:
Mod Comment Please use code tags instead of quote tags (one button to the right)

Last edited by Scrutinizer; 04-10-2012 at 11:00 AM..
 

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TABS(1) 						    BSD General Commands Manual 						   TABS(1)

NAME
tabs -- set terminal tabs SYNOPSIS
tabs [-n | -a | -a2 | -c | -c2 | -c3 | -f | -p | -s | -u] [+m[n]] [-T type] tabs [-T type] [+[n]] n1[,n2,...] DESCRIPTION
The tabs utility displays a series of characters that clear the hardware terminal tab settings then initialises tab stops at specified posi- tions, and optionally adjusts the margin. In the first synopsis form, the tab stops set depend on the command line options used, and may be one of the predefined formats or at regular intervals. In the second synopsis form, tab stops are set at positions n1, n2, etc. If a position is preceded by a '+', it is relative to the previous position set. No more than 20 positions may be specified. If no tab stops are specified, the ``standard'' UNIX tab width of 8 is used. The options are as follows: -n Set a tab stop every n columns. If n is 0, the tab stops are cleared but no new ones are set. -a Assembler format (columns 1, 10, 16, 36, 72). -a2 Assembler format (columns 1, 10, 16, 40, 72). -c COBOL normal format (columns 1, 8, 12, 16, 20, 55) -c2 COBOL compact format (columns 1, 6, 10, 14, 49) -c3 COBOL compact format (columns 1, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 67). -f FORTRAN format (columns 1, 7, 11, 15, 19, 23). -p PL/1 format (columns 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61). -s SNOBOL format (columns 1, 10, 55). -u Assembler format (columns 1, 12, 20, 44). +m[n], +[n] Set an n character left margin, or 10 if n is omitted. -T type Output escape sequence for the terminal type type. ENVIRONMENT
The LANG, LC_ALL, LC_CTYPE and TERM environment variables affect the execution of tabs as described in environ(7). The -T option overrides the setting of the TERM environment variable. If neither TERM nor the -T option are present, tabs will fail. EXIT STATUS
The tabs utility exits 0 on success, and >0 if an error occurs. SEE ALSO
expand(1), stty(1), tput(1), unexpand(1), termcap(5) STANDARDS
The tabs utility conforms to IEEE Std 1003.1-2001 (``POSIX.1''). HISTORY
A tabs utility appeared in PWB UNIX. This implementation was introduced in FreeBSD 5.0. BUGS
The current termcap(5) database does not define the 'ML' (set left soft margin) capability for any terminals. BSD
May 20, 2002 BSD
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