Pair match Output Rows Selector Box
When the match is complete a new table will be created which contains rows determined by the matches which have taken place. The Output Rows selector box allows you to choose on what basis the rows will be included in the output table as a function of the matches that were found.
In all cases each row will refer to only one matched (or possibly unmatched) "object", so that any non-blank columns in a given row come from only rows in the input tables which match according to the specified criteria. However, you have two (somewhat interlinked) choices to make about which rows are produced.
The Match Selection selector allows you to choose what happens when a given row in one table can be matched by more than one row in the other table. There are two choices:
The Join Type selector allows you to choose what output rows result from a match in the input tables.
In most cases (all the above except for 1 not 2 and
2 not 1, the set of columns in the output table contains
all the columns from the first table followed by all the columns
from the second table. If this causes a clash of column names,
offending columns will be renamed with a trailing "_1" or
"_2".
Depending on the details of the match however,
some additional useful columns may be added:
Here is an example. If your input tables are these:
X Y Vmag
- - ----
1134.822 599.247 13.8
659.68 1046.874 17.2
909.613 543.293 9.3
and
X Y Bmag
- - ----
909.523 543.800 10.1
1832.114 409.567 12.3
1135.201 600.100 14.6
702.622 1004.972 19.0
then a Cartesian match of the two sets of X and Y values with an error of 1.0
using the 1 and 2 option would give you a result like this:
X_1 Y_1 Vmag X_2 Y_2 Bmag Separation
--- --- ---- --- --- ---- ----------
1134.822 599.247 13.8 1135.201 600.100 14.6 0.933
909.613 543.293 9.3 909.523 543.800 10.1 0.515
using All from 1 would give you this:
X_1 Y_1 Vmag X_2 Y_2 Bmag Separation
--- --- ---- --- --- ---- ----------
1134.822 599.247 13.8 1135.201 600.100 14.6 0.933
659.68 1046.874 17.2
909.613 543.293 9.3 909.523 543.800 10.1 0.515
and 1 not 2 would give you this:
X Y Vmag
- - ----
659.68 1046.874 17.2