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<H1><A NAME="SECTION001290000000000000000"></A>
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4.9 Output
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Most programs write their results, including <I>PostScript</I> plots, to standard output. The exceptions are those which may
create binary netCDF grd-files such as <A NAME="tex2html245"
HREF="../surface.html"><I><B>surface</B></I></A><A NAME="4724"></A> (due to
the design of netCDF a filename must be provided; however,
alternative output formats allowing piping are available).
With <I>UNIX</I> you can redirect standard output or pipe it
into another process. Error messages, usage messages, and
verbose comments are written to standard error in all cases.
You can use <I>UNIX</I> to redirect standard error as well,
if you want to create a log file of what you are doing.
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<ADDRESS>
Paul Wessel
2001-04-18
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