Texas Instruments TI-83 PLUS - Manual (Page 310)

TI-83 Plus Lists 307
The x-values and y-values of the selected points are stored in
xlistname and ylistname . A new stat plot of xlistname and ylistname
replaces the stat plot from which you selected data points. The list
names are updated in the stat plot editor.
Note: The two new lists ( xlistname and ylistname ) will include the points you
select as left bound and right bound. Also, left-bound x-value

right-bound x-value
must be true.
augment(
augment( concatenates the elements of listA and listB . The list elements
can be real or complex numbers.
augment( listA , listB )