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.\" RCSid "$Id: rcollate.1,v 1.1 2013/09/05 17:53:22 greg Exp $" |
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.TH RCOLLATE 1 7/8/97 RADIANCE |
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.SH NAME |
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rcollate - resize or transpose matrix data |
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.SH SYNOPSIS |
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.B rcollate |
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[ |
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.B \-h |
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][ |
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.B \-f[afdb][N]] |
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][ |
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.B \-t |
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][ |
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.B "\-ic in_col" |
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][ |
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.B "\-ir in_row" |
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][ |
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.B "\-oc out_col" |
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][ |
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.B "\-or out_row" |
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] |
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[ |
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.B input.dat |
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] |
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.SH DESCRIPTION |
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.I Rcollate |
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reads in a single matrix file (table) and reshapes it to have |
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the number of columns specified by the |
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.I \-oc |
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option. |
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By default, the file is assumed to include an information header, which |
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is copied to the standard output along with the command name, but the |
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.I \-h |
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option may be used to turn this behavior off. |
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.PP |
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The input format is assumed to be ASCII, with three white-space separated words |
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(typically numbers) in each record. |
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A different input format may be specified with the |
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.I \-f |
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option. |
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The suboptions are |
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.I \-fa, |
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.I \-ff, |
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.I \-fd, |
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and |
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.I \-fb |
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for ASCII, float, double, and binary, respectively. |
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An optional count may be attached to specify the number of data elements per |
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record, which defaults to 1. |
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Thus, the default setting is |
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.I \-fa3. |
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Since |
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.I rcollate |
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does not interpret the fields, all binary options of the same |
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length have the same result. |
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On most architectures, |
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.I \-ff6, |
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.I \-fd3, |
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and |
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.I \-fb24 |
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would all be equivalent. |
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Note that the lack of row separators in binary files means that |
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.I rcollate |
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does not actually do anything for binary files unless the transpose |
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option is given, also. |
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.PP |
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The transpose option, |
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.I \-t |
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swaps rows and columns on the input. |
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For binary files, the user must specify at least one input or output |
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dimension to define the matrix size. |
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For ASCII files, |
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.I rcollate |
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will automatically determine the number of columns based on the |
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position of the first EOL (end-of-line) character, and the number |
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of rows based on the total count of records in the file. |
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The user may override these determinations, allowing the matrix to |
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be resized as well as transposed. |
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If input and output dimensions are given, the number of input rows |
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must equal the number of output columns, |
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and the number of input columns must equal the number of output rows. |
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For large transpose operations on Unix systems, it is most efficient |
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to specify the input file on the command line, rather than reading |
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from the standard input, since |
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.I rcollate |
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can map the file directly into memory. |
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.SH EXAMPLE |
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To change put 8760 color triplets per row in a matrix with no header: |
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.IP "" .2i |
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rcollate -h \-oc 8760 input.dat > col8760.dat |
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.PP |
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To transpose a binary file with 145 float triplets per input row: |
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.IP "" .2i |
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rcollate -ff3 -ic 145 -t orig.flt > transpose.flt |
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.SH AUTHOR |
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Greg Ward |
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.SH NOTES |
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The |
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.I rcollate |
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command is rather inflexible when it comes to output field and record |
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separators for ASCII data. |
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It accepts any amount of white space between fields |
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on input, but only produces spaces as field separators |
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between words and tabs as record separators on output. |
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Output row separtors will always be an EOL, which may differ between systems. |
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.PP |
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If no options are given on the command line, or a binary file is specified |
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without a transpose, |
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.I rcollate |
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issues a warning and simply copies its input to its standard output. |
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.SH "SEE ALSO" |
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cnt(1), histo(1), neaten(1), rcalc(1), rlam(1), tabfunc(1), total(1) |
