tabmerge man page

tabmerge — unify delimited files on common fields

Synopsis

tabmerge [action] [options] file1 file2 [...]

Actions:

--min                Take only fields present in all files [DEFAULT]
--max                Take all fields present
-f|--fields=f1[,f2]  Take only the fields mentioned in the 
                     comma-separated list

Options:

-l|--list            List available fields
--fs=x               Use "x" as the field separator 
                     (default is tab "\t")
--rs=x               Use "x" as the record separator 
                     (default is newline "\n")
-s|--sort=f1[,f2]    Sort data ASCII-betically on field(s)
--stdout             Print data in original delimited format
                     (i.e., not in a table format)
--help               Show brief help and quit
--man                Show full documentation

Description

This program merges the fields -- not the rows -- of delimited text files. That is, if several files are almost but not quite entirely unlike each other in their structure (in their field names, numbers or orders), this script allows you to easily unify the files into one file with all the same fields. The output can be based on fields as determined by the three "action" flags.

For the following examples, consider three files that contain the following fields:

+------------+---------------------------------+
| File       | Fields                          |
+------------+---------------------------------+
| merge1.tab | name, type, position            |
| merge2.tab | name, type, position, lod_score |
| merge3.tab | name, position                  |
+------------+---------------------------------+

To list all available fields in the files and the number of times they are present:

$ tabmerge --list merge*
+-----------+-------------------+
| Field     | No. Times Present |
+-----------+-------------------+
| lod_score | 1                 |
| name      | 3                 |
| position  | 3                 |
| type      | 2                 |
+-----------+-------------------+

To merge the files on the minimum overlapping fields:

$ tabmerge merge*
+----------+----------+
| name     | position |
+----------+----------+
| RM104    | 2.30     |
| RM105    | 4.5      |
| TX5509   | 10.4     |
| UU189    | 19.0     |
| Xpsm122  | 3.3      |
| Xpsr9556 | 4.5      |
| DRTL     | 2.30     |
| ALTX     | 4.5      |
| DWRF     | 10.4     |
+----------+----------+

To merge the files and include all the fields:

$ tabmerge --max merge*
+-----------+----------+----------+--------+
| lod_score | name     | position | type   |
+-----------+----------+----------+--------+
|           | RM104    | 2.30     | RFLP   |
|           | RM105    | 4.5      | RFLP   |
|           | TX5509   | 10.4     | AFLP   |
| 2.4       | UU189    | 19.0     | SSR    |
| 1.2       | Xpsm122  | 3.3      | Marker |
| 1.2       | Xpsr9556 | 4.5      | Marker |
|           | DRTL     | 2.30     |        |
|           | ALTX     | 4.5      |        |
|           | DWRF     | 10.4     |        |
+-----------+----------+----------+--------+

To merge and extract just the "name" and "type" fields:

$ tabmerge -f name,type merge*
+----------+--------+
| name     | type   |
+----------+--------+
| RM104    | RFLP   |
| RM105    | RFLP   |
| TX5509   | AFLP   |
| UU189    | SSR    |
| Xpsm122  | Marker |
| Xpsr9556 | Marker |
| DRTL     |        |
| ALTX     |        |
| DWRF     |        |
+----------+--------+

To merge the files on just the "name" and "lod_score" fields and sort on the name:

$ tabmerge -f name,lod_score -s name merge*
+----------+-----------+
| name     | lod_score |
+----------+-----------+
| ALTX     |           |
| DRTL     |           |
| DWRF     |           |
| RM104    |           |
| RM105    |           |
| TX5509   |           |
| UU189    | 2.4       |
| Xpsm122  | 1.2       |
| Xpsr9556 | 1.2       |
+----------+-----------+

To do the same but mimic the original tab-delimited input:

$ tabmerge -f name,lod_score -s name --stdout merge*
name    lod_score
ALTX
DRTL
DWRF
RM104
RM105
TX5509
UU189   2.4
Xpsm122 1.2
Xpsr9556        1.2

Why would you want to do this? Suppose you have several delimited text files with nearly the same structure and want to create just one file from them, but the fields may be in a different order in each file and/or some files may contain more or fewer fields than others. (As far-fetched as it may seem, it happens to the author more than he'd like.)

See Also

·
Text::RecordParser
·
Text::TabularDisplay

Author

Ken Youens-Clark <kclark@cpan.org>.

Info

2015-04-21 perl v5.24.0 User Contributed Perl Documentation