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<H2><A NAME="SECTION001712000000000000000"></A>
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B.1.2 Binary tables
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<A NAME="tex2html573"
HREF="http://www.soest.hawaii.edu/gmt"><B>GMT</B></A> programs also support binary tables to speed up input-output
for i/o-intensive tasks like gridding and preprocessing. Files
may have no header (hence the <B>-H</B> option cannot be used)
and all data must either be single or double precision (no mixing
allowed). Multiple segment files are allowed (<B>-M</B>) and the
segment headers are assumed to be records where all the fields equal
NaN. Flags appended to <B>-M</B> are ignored. The format and number
of fields are specified with the
<B>-b</B> option. Thus, for input you may set <B>-bi</B>[<B>s</B>][<I>n</I>],
where <B>s</B> designates single precision (default is double) and
<I>n</I> is the number of fields. For output, use <B>-bo</B>[<B>s</B>]
(the programs know how many columns to write).
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<ADDRESS>
Paul Wessel
2001-04-18
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