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Comparing ray/doc/man/man1/rcollate.1 (file contents):
Revision 1.3 by greg, Fri Sep 6 21:34:38 2013 UTC vs.
Revision 1.5 by greg, Fri May 30 00:00:54 2014 UTC

# Line 69 | Line 69 | Note that the lack of row separators in binary files m
69   does not actually do anything for binary files unless the transpose
70   option is given, also.
71   .PP
72 + If an input header is present, it may contain the format, number of components
73 + and matrix dimensions.
74 + In such cases, the
75 + .I \-ic,
76 + .I \-ir
77 + and
78 + .I \-f
79 + options are not required, but will be checked against the header
80 + information if provided.
81 + .PP
82   The transpose option,
83   .I \-t
84   swaps rows and columns on the input.
# Line 88 | Line 98 | For large transpose operations on Unix systems, it is
98   to specify the input file on the command line, rather than reading
99   from the standard input, since
100   .I rcollate
101 < can map the file directly into memory.
101 > can map the file directly into virtual memory.
102   .SH EXAMPLE
103   To change put 8760 color triplets per row in a matrix with no header:
104   .IP "" .2i

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