x2sys_report
x2sys_report - Report statistics from crossover data base
Synopsis
x2sys_report -Ccolumn -TTAG [ coedbase.txt ]
[ -A ]
[ -I[list] ]
[ -L[corrtable] ]
[ -Nnx_min ]
[ -Qe|i ]
[ [ -Rregion ]
[ -Strack ]
[ -V[level] ]
Note: No space is allowed between the option flag and the associated arguments.
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.
Required 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.
- -Ccolumn
- Specify which data column you want to process. Crossovers related to
this column name must be present in the crossover data base.
- -TTAG
- Specify the x2sys TAG which tracks the attributes of this data type.
Optional Arguments
- -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[list]
- Name of ASCII file with a list of track names (one per record) that
should be excluded from consideration [Default includes all tracks].
- -L[corrtable]
- Apply optimal corrections to the chosen observable. Append the
correction table to use [Default uses the correction table
TAG_corrections.txt which is expected to reside in the
$X2SYS_HOME/TAG directory]. For the format of this file, see
x2sys_solve.
- -Nnx_min
- Only report data from tracks involved in at least nx_min crossovers [all tracks].
- -Qe|i
- Append e for external crossovers or i for internal
crossovers only [Default is external].
- -R[unit]west/east/south/north[/zmin/zmax][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).
Alternatively for grid creation, give Rcodelon/lat/nx/ny, where
code is a 2-character combination of L, C, R (for left, center, or right)
and T, M, B for top, middle, or bottom. e.g., BL for lower left. This
indicates which point on a rectangular region the lon/lat coordinate
refers to, and the grid dimensions nx and ny with grid spacings via
-I is used to create the corresponding region.
Alternatively, specify the name of an existing grid file and the
-R settings (and grid spacing, if applicable) are copied from
the grid. Using -Runit expects projected (Cartesian)
coordinates compatible with chosen -J and we inversely project
to determine actual rectangular geographic region.
For perspective view (-p), optionally append /zmin/zmax.
In case of perspective view (-p), a z-range (zmin, zmax)
can be appended to indicate the third dimension. This needs to be
done only when using the -Jz option, not when using only the
-p option. In the latter case a perspective view of the plane is
plotted, with no third dimension. For Cartesian
data just give xmin/xmax/ymin/ymax. This option bases the
statistics on those COE that fall inside the specified domain.
- -Strack
- Name of a single track. If given we restrict output to those
crossovers involving this track [Default output is crossovers
involving any track pair].
- -V[level] (more ...)
- Select verbosity level [c].
- -^ or just -
- Print a short message about the syntax of the command, then exits (NOTE: on Windows use just -).
- -+ or just +
- Print an extensive usage (help) message, including the explanation of
any module-specific option (but not the GMT common options), then exits.
- -? or no arguments
- Print a complete usage (help) message, including the explanation of
options, then exits.
- --version
- Print GMT version and exit.
- --show-datadir
- Print full path to GMT share directory and exit.
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
gmt 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
gmt x2sys_report COE_data.txt -V -TMGD77 -Cfaa -S2345678 > 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.