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part - split up a single input file into multiple files according to a
column value
# Split a comma separated file according to the third column
# keeping and reproducing one line of headers
perl -w example.csv --header-line=1 --column=3 "--separator=,"
# Split a tab separated file according to the second column
perl -w example.tsv --column=2 --separator=009
--out - set the output template
If the output template is not given it is guessed from the name of
the first input file or set to `part-%s.txt'. The `%s' will be
replaced by the column value.
--column - set the column to part on
This is the zero-based number of the column. Multiple columns may be
--separator - set the column separator
This is the separator for the columns. It defaults to a tab
character ("\t").
--header-line - output the first line into every file
This defines the line as header line which is output into every
file. If it is given an argument that string is output as header,
otherwise the first line read will be repeated as the header.
If the value is a number, that many lines will be read from the file
and used as the header. This makes it impossible to use just a
number as the header.
--verbose - output the generated filenames
In normal operation, the program will be silent. If you need to know
the generated filenames, the `--verbose' option will output them.
--filename-sep - set the separator for the filenames
If you prefer a different separator for the filenames than a
newline, this option allows you to set it. If the separator looks
like an octal number (three digits) it is interpreted as such.
Otherwise it will be taken literally. A common use is to set the
separator to `000' to separate the files by the zero character if
you suspect that your filenames might contain newlines.
It defaults to `012', a newline.
--version - output version information
The program loads the whole input into RAM before writing the output. A
future enhancement might be a `uniq'-like option that tells the program
to assume that the input will be grouped according to the parted column
so it does not need to allocate memory.
If your memory is not large enough, the following `awk' one-liner might
help you:
# Example of parting on column 3
awk -F '{ print $0 > $3 }' FILE
The public repository of this program is
The public support forum of this program is The
homepage is .
Please report bugs via
Copyright (c) 2007-2011 Max Maischein (`')