You can define a Row Subset in one of the following ways:
) or
Subset From Unselected Rows (
)
buttons to create a new subset based
on the set of highlighted rows or their complement.
Combining this with sorting the rows in the table can be useful; if you do a Sort Up on a given column and then drag out the top few rows of the table you can easily create a subset consisting of the highest values of a given column.
) button will pop up
the Algebraic Subset Window
which allows you to define a new subset using an algebraic expression
based on the values of the cells in each row.
The format of such expressions is described in Section 7.
or
)
button then a new subset will be
created containing only rows represented by points in the field of
view of the plot at the time.
) button in some of the the graphics windows.
This allows you
to trace out with the mouse a region or regions of any shape,
creating a new subset containing only those rows represented by
the points within those regions.
In all these cases you will be asked to assign a name for the subset. As with column names, it is a good idea to follow a few rules for these names so that they can be used in algebraic expressions. They should be:
In the first subset definition method above, the current subset will be set immediately to the newly created one. In other cases the new subset may be highlighted appropriately in other windows, for instance by being plotted in scatter plot windows.