Texas Instruments TI-89 Voyage 200, User Manual

Page: 536 / 1008

Data/Matrix Editor 536
Sorting All Columns Based on a “Key” Column
Sorting All Columns Based on a “Key” Column Sorting All Columns Based on a “Key” Column
Sorting All Columns Based on a “Key” Column
Consider a database structure in which each column along the same row contains
related information (such as a student’s first name, last name, and test scores). In such a
case, sorting only a single column would destroy the relationship between the columns.
In the Data/Matrix Editor:
When using this procedure for a data variable:
• All columns must have the same length.
• None of the columns can be locked (defined by a function in the column header).
When the cursor is in a locked column,
Œ
is shown at the beginning of the entry line.
1. Move the cursor to any cell in the “key”
column.
2. In this example, move the cursor to the
second column (
c2
) to sort by last name.
Note:
For a
list
variable, this is the same
as sorting a single column.
3. Press:
2
ˆ
and select
4:Sort Col
, adjust all.
Note:
This menu item is not available if
any column is locked.