X2SYS_REPORT(1gmt)					       Generic Mapping Tools						X2SYS_REPORT(1gmt)

NAME

       x2sys_report - Report statistics from crossover data base

SYNOPSIS

       x2sys_report  -Ccolumn -TTAG [ coedbase.txt ] [ -A ] [ -I[list] ] [ -L[corrtable] ] [ -Nnx_min ] [ -Qe|i ] [ -Rwest/east/south/north[r] ] [
       -Strack ] [ -V ]

DESCRIPTION

       x2sys_report will read the input crossover ASCII data base coedbase.txt (or stdin) and report on the statistics	of  crossovers	(n,  mean,
       stdev, rms, weight) for each track.  Options are available to let you exclude tracks and limit the output.

       -C     Specify which data column you want to process.  Crossovers related to this column name must be present in the crossover data base.

       -T     Specify the x2sys TAG which tracks the attributes of this data type.

OPTIONS

       No space between the option flag and the associated arguments.

       coedbase.txt
	      The name of the input ASCII crossover error data base as produced by x2sys_cross.  If not given we read standard input instead.

       -A     Eliminate  COEs by distributing the COE between the two tracks in proportion to track weight and producing (dist, adjustment) spline
	      knots files for each track (for the selected column).  Such adjustments may be used by x2sys_datalist.   The  adjustment	files  are
	      called  track.column.adj	and  are  placed in the $X2SYS_HOME/TAG directory. For background information on how these adjustments are
	      designed, see Mittal [1984].

       -I     Name of ASCII file with a list of track names (one per record) that should be excluded  from  consideration  [Default  includes  all
	      tracks].

       -L     Apply  optimal corrections to the chosen observable.  Append the correction table to use [Default uses the correction table TAG_cor-
	      rections.txt which is expected to reside in the $X2SYS_HOME/TAG directory].  For the format of this file, see x2sys_solve.

       -N     Only report data from tracks involved in at least nx_min crossovers [all tracks].

       -Q     Append e for external crossovers or i for internal crossovers only [Default is external].

       -R     west,  east,  south,  and  north	specify  the  Region  of  interest,  and  you  may  specify  them  in  decimal	 degrees   or	in
	      [+-]dd:mm[:ss.xxx][W|E|S|N]  format.   Append r if lower left and upper right map coordinates are given instead of w/e/s/n.  The two
	      shorthands -Rg and -Rd stand for global domain (0/360 and -180/+180 in longitude respectively, with -90/+90 in  latitude).  Alterna-
	      tively,  specify	the  name of an existing grid file and the -R settings (and grid spacing, if applicable) are copied from the grid.
	      For Cartesian data just give xmin/xmax/ymin/ymax.  This option bases the statistics on those COE	that  fall  inside  the  specified
	      domain.

       -S     Name  of a single track.	If given we restrict output to those crossovers involving this track [Default output is crossovers involv-
	      ing any track pair].

       -V     Selects verbose mode, which will send progress reports to stderr [Default runs "silently"].

EXAMPLES

       To report statistics of all the external magnetic crossovers associated with the tag MGD77 from the file COE_data.txt, restricted to occupy
       a certain region in the south Pacific, try

       x2sys_report COE_data.txt -V -TMGD77 -R180/240/-60/-30 -Cmag > mag_report.txt

       To report on the faa crossovers globally that involves track 12345678, try

       x2sys_report COE_data.txt -V -TMGD77 -Cfaa -S12345678  > faa_report.txt

REFERENCES

       Mittal, P. K.(1984), Algorithm for error adjustment of potential field data along a survey network, Geophysics, 49(4), 467-469.

SEE ALSO

       x2sys_binlist(1) x2sys_cross(1) x2sys_datalist(1) x2sys_get(1) x2sys_init(1) x2sys_list(1) x2sys_put(1) x2sys_solve(1)

GMT 4.5.7							    15 Jul 2011 						X2SYS_REPORT(1gmt)