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tabcols - Select columns, and optionally rearrange, from a table
tabcols
[parameter=value] ...
tabcols selects columns from a file, and
can also re-arrange the output column order. New column separators can be
used on output. This way a newline on input can be converted into a space
on output and therefore creating a file with one long column from a table
with mulitple columns.
To select specific lines, use tabrows(1NEMO)
or tabmath(1NEMO)
.
To align a table by column, use the column(1)
program with the -t option.
The following parameters are recognized in order; they may
be given in any order if the keyword is also given. Use --help to confirm
this man page is up to date.
- in=
- input file name(s). No default.
- select=
- list of columns to select. Any nemoinp(1NEMO)
expression can be used. Columns
can be repeated, and in any order. The output will be in exactly the same
order as given with this keyword. First column is 1. Column 0 can also be
added to the output, which is the row number (first row is 1). [all]
- colsep=
- Column separator. Valid are: s (space), n (newline), t (tab),
r (carriage return), as well as the literal symbols ’,’ and ’:’. [Default:
s]
- out=-
- output file name. By default standard output it used.
Although
this program uses the new table interface, there are still some internal
variables that limits the column count.
Here is an example of how
to reverse the columns from a table with 4 columns:
tabcols in.tab 4:1:-1 > out.tab
and here is an example that re-arranges all the numbers in a table in one
long column
tabcols in.tab all n > out.tab
tabrows(1NEMO)
, tabmath(1NEMO)
, tabs(1NEMO)
, tabtab(1NEMO)
, awk(1)
,
column(1)
src/kernel/tab/tabcols.c source code
Peter Teuben
26-Jan-00 V1.0 Created PJT
9-apr-09 V2.0 out=- now default and last argument PJT
5-may-2022 V2.1 converted to table V2 interface PJT
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