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-.\" Copyright (c) 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"	@(#)rs.1	8.2 (Berkeley) 12/30/93
-.\"
-.TH RS 1 "December 30, 1993"
-.UC 4
-.SH NAME
-rs \- reshape a data array
-.SH SYNOPSIS
-\fBrs [ \-[csCS][\fRx\fB][kKgGw][\fRN\fB]tTeEnyjhHm ] [ \fRrows\fB [ \fRcols\fB ] ]\fR
-.SH DESCRIPTION
-.I Rs
-reads the standard input, interpreting each line as a row
-of blank-separated entries in an array,
-transforms the array according to the options,
-and writes it on the standard output.
-With no arguments it transforms stream input into a columnar
-format convenient for terminal viewing.
-.PP
-The shape of the input array is deduced from the number of lines
-and the number of columns on the first line.
-If that shape is inconvenient, a more useful one might be
-obtained by skipping some of the input with the \fB\-k\fP option.
-Other options control interpretation of the input columns.
-.PP
-The shape of the output array is influenced by the
-.I rows
-and
-.I cols
-specifications, which should be positive integers.
-If only one of them is a positive integer,
-.I rs
-computes a value for the other which will accommodate
-all of the data.
-When necessary, missing data are supplied in a manner
-specified by the options and surplus data are deleted.
-There are options to control presentation of the output columns,
-including transposition of the rows and columns.
-.PP
-The options are described below.
-.IP \fB\-c\fRx
-Input columns are delimited by the single character \fIx\fP.
-A missing \fIx\fP is taken to be `^I'.
-.IP \fB\-s\fRx
-Like \fB\-c\fR, but maximal strings of \fIx\fP are delimiters.
-.IP \fB\-C\fRx
-Output columns are delimited by the single character \fIx\fP.
-A missing \fIx\fP is taken to be `^I'.
-.IP \fB\-S\fRx
-Like \fB\-C\fR, but padded strings of \fIx\fP are delimiters.
-.IP \fB\-t\fR
-Fill in the rows of the output array using the columns of the
-input array, that is, transpose the input while honoring any
-.I rows
-and
-.I cols
-specifications.
-.IP \fB\-T\fR
-Print the pure transpose of the input, ignoring any
-.I rows
-or
-.I cols
-specification.
-.IP \fB\-k\fRN
-Ignore the first \fIN\fR lines of input.
-.IP \fB\-K\fRN
-Like \fB\-k\fR, but print the ignored lines.
-.IP \fB\-g\fRN
-The gutter width (inter-column space), normally 2, is taken to be \fIN\fR.
-.IP \fB\-G\fRN
-The gutter width has \fIN\fR percent of the maximum
-column width added to it.
-.IP \fB\-e\fR
-Consider each line of input as an array entry.
-.IP \fB\-n\fR
-On lines having fewer entries than the first line,
-use null entries to pad out the line.
-Normally, missing entries are taken from the next line of input.
-.IP \fB\-y\fR
-If there are too few entries to make up the output dimensions,
-pad the output by recycling the input from the beginning.
-Normally, the output is padded with blanks.
-.IP \fB\-h\fR
-Print the shape of the input array and do nothing else.
-The shape is just the number of lines and the number of
-entries on the first line.
-.IP \fB\-H\fR
-Like \fB\-h\fR, but also print the length of each line.
-.IP \fB\-j\fR
-Right adjust entries within columns.
-.IP \fB\-w\fRN
-The width of the display, normally 80, is taken to be the positive
-integer \fIN\fP.
-.IP \fB\-m\fR
-Do not trim excess delimiters from the ends of the output array.
-.PP
-With no arguments,
-.I rs
-transposes its input, and assumes one array entry per input line
-unless the first non-ignored line is longer than the display width.
-Option letters which take numerical arguments interpret a missing
-number as zero unless otherwise indicated.
-.SH EXAMPLES
-.de IC
-.IP
-.ss 36
-.ft B
-..
-.de NC
-.br
-.ss 12
-.PP
-..
-.I Rs
-can be used as a filter to convert the stream output
-of certain programs (e.g.,
-.IR spell ,
-.IR du ,
-.IR file ,
-.IR look ,
-.IR nm ,
-.IR who ,
-and
-.IR wc (1))
-into a convenient ``window'' format, as in
-.IC
-who | rs
-.NC
-This function has been incorporated into the
-.IR ls (1)
-program, though for most programs with similar output
-.I rs
-suffices.
-.PP
-To convert stream input into vector output and back again, use
-.IC
-rs 1 0 | rs 0 1
-.NC
-A 10 by 10 array of random numbers from 1 to 100 and
-its transpose can be generated with
-.IC
-jot \-r 100 | rs 10 10 | tee array | rs \-T > tarray
-.NC
-In the editor
-.IR vi (1),
-a file consisting of a multi-line vector with 9 elements per line
-can undergo insertions and deletions,
-and then be neatly reshaped into 9 columns with
-.IC
-:1,$!rs 0 9
-.NC
-Finally, to sort a database by the first line of each 4-line field, try
-.IC
-rs \-eC 0 4 | sort | rs \-c 0 1
-.NC
-.SH SEE ALSO
-jot(1), vi(1), sort(1), pr(1)
-.SH BUGS
-Handles only two dimensional arrays.
-
-The algorithm currently reads the whole file into memory,
-so files that do not fit in memory will not be reshaped.
-
-Fields cannot be defined yet on character positions.
-
-Re-ordering of columns is not yet possible.
-
-There are too many options.