SUXCONTOUR - X CONTOUR plot of Seismic UNIX tracefile via vector plot call

suxwigb <stdin [optional parameters] | ...

Optional parameters:
key=(keyword) if set, the values of x2 are set from header field
specified by keyword
n2=tr.ntr or number of traces in the data set (ntr is an alias for n2)
d1=tr.d1 or tr.dt/10^6 sampling interval in the fast dimension
=.004 for seismic (if not set)
=1.0 for nonseismic (if not set)
d2=tr.d2 sampling interval in the slow dimension
=1.0 (if not set)
f1=tr.f1 or tr.delrt/10^3 or 0.0 first sample in the fast dimension
f2=tr.f2 or tr.tracr or tr.tracl first sample in the slow dimension
=1.0 for seismic (if not set)
=d2 for nonseismic (if not set)

verbose=0 =1 to print some useful information

tmpdir= if non-empty, use the value as a directory path
prefix for storing temporary files; else if the
the CWP_TMPDIR environment variable is set use
its value for the path; else use tmpfile()

Note that for seismic time domain data, the "fast dimension" is
time and the "slow dimension" is usually trace number or range.
Also note that "foreign" data tapes may have something unexpected
in the d2,f2 fields, use segyclean to clear these if you can afford
the processing time or use d2= f2= to override the header values if
not.

If key=keyword is set, then the values of x2 are taken from the header
field represented by the keyword (for example key=offset, will show
traces in true offset). This permit unequally spaced traces to be plotted.
Type sukeyword -o to see the complete list of SU keywords.

This program is really just a wrapper for the plotting program: xcontour
See the xcontour selfdoc for the remaining parameters.



Credits:

CWP: Dave Hale and Zhiming Li (xwigb, etc.)
Jack Cohen and John Stockwell (suxwigb, etc.)
Delphi: Alexander Koek, added support for irregularly spaced traces
Aarhus University: Morten W. Pedersen copied everything from the xwigb
source and just replaced all occurencies of the word
xwigb with xcountour ;-)

Notes:
When the number of traces isn't known, we need to count
the traces for xcontour. You can make this value "known"
either by getparring n2 or by having the ntr field set
in the trace header. A getparred value takes precedence
over the value in the trace header.

When we must compute ntr, we don't allocate a 2-d array,
but just content ourselves with copying trace by trace from
the data "file" to the pipe into the plotting program.
Although we could use tr.data, we allocate a trace buffer
for code clarity.