Texas Instruments TITANIUM TI-89 - Manual (Page 542)

Statistics and Data Plots 542
From the Data/Matrix Editor:
1. Press ‡ to display the
Calculate dialog
box.
This example shows all items as active.
On your calculator, items are active only if
they are valid for the current settings of
Calculation Type and Freq and Categories.
Note: If an item is not valid for the current
settings, it will appear dimmed. You
cannot move the cursor to a dimmed item
Pathname of the data
variable