man/man1/rsplit.1

.\" RCSid "$Id: rsplit.1,v 1.6 2019/07/22 18:01:03 greg Exp $"
.TH RSPLIT 1 7/8/97 RADIANCE
.SH NAME
rsplit - splits standard input into multiple output files or streams
.SH SYNOPSIS
.B rsplit
[
.B \-tS
][
.B \-ih
][
.B \-iH
][
.B \-oh
][
.B \-oH
][
.B "\-x xres \-y yres"
][
.B \-oaN
|
.B \-ofN
|
.B \-odN
|
.B \-ocN
|
.B \-oiN
|
.B \-owN
|
.B \-obN
][
.B \-f
][
.B \-a
][
.B "\-on M"
]
output1 [options] output2 ..
.SH DESCRIPTION
.I Rsplit
writes lines or fields from the standard input to one or more output
streams.
By default, fields are separated by a
newline character (i.e., input is distributed by lines),
but the terminator can be changed using the
.I \-t
option.
Different terminators may be given for different fields by specifying
additional
.I \-t
options between each output specification.
Note that there is no space between this option and its argument.
.PP
An output is either a file or a command.
If an output file exists, it will not be overwritten unless the
.I \-f
option is given, or it is being appended using the
.I \-a
option.
Commands are given in quotes, and begin with an exclamantion point ('!').
.PP
The
.I \-oa
option may be used to specify ASCII data (the default), or the
.I \-of
option may be used to indicated binary IEEE 32-bit floats.
Similarly, the
.I \-od
and
.I \-oi
options may be used to indicate binary 64-bit doubles or integer words,
respectively.
The
.I \-ow
option specifies 2-byte short words, and the
.I \-ob
option specifies bytes.
If a number immediately follows any of these options, then it
indicates that multiple such values are expected for each record.
For example,
.I \-of3
indicates three floats per output record for the next named output.
In the case of the
.I \-oa
option, no number writes one line or field per stream, and numbers
greater than zero write multiple fields per record to the same stream.
If the terminating character is set to something other than newline ('\\n'),
a newline is added after each record (in addition to the terminator).
For binary output formts, no number implies one value per output.
No terminator characters are expected or written for binary outputs.
.PP
If a
.I \-on
option is given with a positive integer argument, this will be the
maximum number of records that will be written by
.I rsplit.
.PP
A hyphen ('-') by itself can be used to indicate the standard
output, and may appear multiple times.
Results will be unpredictable if the standard output is specified
in this way
and any of the command outputs also writes to their standard output.
At most, one command may reliably write to its standard output.
.PP
The
.I \-ih
option tells
.I rsplit
to expect a Radiance header on its input.
The
.I \-iH
option says to expect a resolution string for an image or similar.
The
.I \-x
and
.I \-y
options may alternatively be used to specify the input dimensions.
The
.I \-oh
option tells
.I rsplit
to produce a Radiance header on the next output stream.
The
.I \-oH
option will write a resolution string.
These options toggle the associated mode on and off,
so it is possible to have one output include a header or
resolution string and not the next by specifying the option(s) again.
Neither
.I \-oh
nor
.I \-oH
may be used with the append mode ('-a'), which may also be toggled.
.SH EXAMPLES
To alternate 5 lines between two output files:
.IP "" .2i
rsplit -oa5 output1.txt output2.txt < input.txt
.PP
To send the first of each double precision triplet to one file, and the second
and third to a second file, stopping after 500 triplets:
.IP "" .2i
rsplit -on 500 -od firstvals.dbl -od2 followingpairs.dbl < triplets.dbl
.PP
To convey material, color and distance information from rtrace to
separate files:
.IP "" .2i
vwrays [viewspec] | rtrace [options] -x 1024 -y 768 -h+ -oMlv octree | rsplit -ih -iH -t^I mats.txt -of depth.zbf -oh -oH -of3 '!pvalue -r -df > image.hdr'
.SH AUTHOR
Greg Ward
.SH "SEE ALSO"
cnt(1), histo(1), neaten(1), rcalc(1), rcode_depth(1),
rcode_ident(1), rcode_norm(1), rlam(1), rtrace(1),
split(1), tabfunc(1), total(1)
Revision:	1.7
Committed:	Thu Aug 22 21:54:46 2019 UTC (5 years, 8 months ago) by greg
Branch:	MAIN
Changes since 1.6:	+2 -6 lines
Log Message:	Wording improvements
#	User	Rev	Content
1	greg	1.7	.\" RCSid "$Id: rsplit.1,v 1.6 2019/07/22 18:01:03 greg Exp $"
2	greg	1.1	.TH RSPLIT 1 7/8/97 RADIANCE
3			.SH NAME
4			rsplit - splits standard input into multiple output files or streams
5			.SH SYNOPSIS
6			.B rsplit
7			[
8			.B \-tS
9			][
10			.B \-ih
11			][
12			.B \-iH
13			][
14			.B \-oh
15			][
16			.B \-oH
17			][
18	greg	1.3	.B "\-x xres \-y yres"
19			][
20	greg	1.1	.B \-oaN
21			\|
22			.B \-ofN
23			\|
24			.B \-odN
25			\|
26			.B \-ocN
27			\|
28			.B \-oiN
29			\|
30			.B \-owN
31			\|
32			.B \-obN
33			][
34			.B \-f
35			][
36			.B \-a
37			][
38			.B "\-on M"
39			]
40			output1 [options] output2 ..
41			.SH DESCRIPTION
42			.I Rsplit
43			writes lines or fields from the standard input to one or more output
44			streams.
45			By default, fields are separated by a
46	greg	1.3	newline character (i.e., input is distributed by lines),
47			but the terminator can be changed using the
48	greg	1.1	.I \-t
49			option.
50	greg	1.3	Different terminators may be given for different fields by specifying
51	greg	1.1	additional
52			.I \-t
53	greg	1.3	options between each output specification.
54	greg	1.1	Note that there is no space between this option and its argument.
55			.PP
56			An output is either a file or a command.
57			If an output file exists, it will not be overwritten unless the
58			.I \-f
59			option is given, or it is being appended using the
60			.I \-a
61			option.
62			Commands are given in quotes, and begin with an exclamantion point ('!').
63			.PP
64			The
65			.I \-oa
66			option may be used to specify ASCII data (the default), or the
67			.I \-of
68			option may be used to indicated binary IEEE 32-bit floats.
69			Similarly, the
70			.I \-od
71			and
72			.I \-oi
73			options may be used to indicate binary 64-bit doubles or integer words,
74			respectively.
75			The
76			.I \-ow
77			option specifies 2-byte short words, and the
78			.I \-ob
79			option specifies bytes.
80			If a number immediately follows any of these options, then it
81			indicates that multiple such values are expected for each record.
82			For example,
83			.I \-of3
84			indicates three floats per output record for the next named output.
85			In the case of the
86			.I \-oa
87			option, no number writes one line or field per stream, and numbers
88	greg	1.3	greater than zero write multiple fields per record to the same stream.
89			If the terminating character is set to something other than newline ('\\n'),
90			a newline is added after each record (in addition to the terminator).
91	greg	1.1	For binary output formts, no number implies one value per output.
92	greg	1.7	No terminator characters are expected or written for binary outputs.
93	greg	1.1	.PP
94			If a
95			.I \-on
96			option is given with a positive integer argument, this will be the
97			maximum number of records that will be written by
98			.I rsplit.
99			.PP
100			A hyphen ('-') by itself can be used to indicate the standard
101			output, and may appear multiple times.
102			Results will be unpredictable if the standard output is specified
103			in this way
104			and any of the command outputs also writes to their standard output.
105			At most, one command may reliably write to its standard output.
106			.PP
107			The
108			.I \-ih
109			option tells
110			.I rsplit
111			to expect a Radiance header on its input.
112			The
113			.I \-iH
114			option says to expect a resolution string for an image or similar.
115			The
116			.I \-x
117			and
118			.I \-y
119			options may alternatively be used to specify the input dimensions.
120			The
121			.I \-oh
122			option tells
123			.I rsplit
124			to produce a Radiance header on the next output stream.
125			The
126			.I \-oH
127			option will write a resolution string.
128			These options toggle the associated mode on and off,
129			so it is possible to have one output include a header or
130			resolution string and not the next by specifying the option(s) again.
131			Neither
132			.I \-oh
133			nor
134			.I \-oH
135	greg	1.6	may be used with the append mode ('-a'), which may also be toggled.
136	greg	1.5	.SH EXAMPLES
137	greg	1.1	To alternate 5 lines between two output files:
138			.IP "" .2i
139	greg	1.2	rsplit -oa5 output1.txt output2.txt < input.txt
140	greg	1.1	.PP
141			To send the first of each double precision triplet to one file, and the second
142			and third to a second file, stopping after 500 triplets:
143			.IP "" .2i
144	greg	1.2	rsplit -on 500 -od firstvals.dbl -od2 followingpairs.dbl < triplets.dbl
145	greg	1.1	.PP
146			To convey material, color and distance information from rtrace to
147			separate files:
148			.IP "" .2i
149			vwrays [viewspec] \| rtrace [options] -x 1024 -y 768 -h+ -oMlv octree \| rsplit -ih -iH -t^I mats.txt -of depth.zbf -oh -oH -of3 '!pvalue -r -df > image.hdr'
150			.SH AUTHOR
151			Greg Ward
152			.SH "SEE ALSO"
153	greg	1.6	cnt(1), histo(1), neaten(1), rcalc(1), rcode_depth(1),
154			rcode_ident(1), rcode_norm(1), rlam(1), rtrace(1),
155	greg	1.1	split(1), tabfunc(1), total(1)