Texas Instruments TI-83 PLUS - Manual (Page 241)

TI-83 Plus Draw Instructions 238
Using pxl . Test(
pxl . Test( (pixel test) returns 1 if the pixel at ( row,column ) is turned on or 0 if
the pixel is turned off on the current graph. row must be an integer
between 0 and 62. column must be an integer between 0 and 94.
pxl . Test( row , column )
Split Screen
On a Horiz split screen, the maximum value for row is 30 for Pxl . On( ,
Pxl . Off( , Pxl . Change( , and pxl . Test( .
On a G . T split screen, the maximum value for row is 50 and the maximum
value for column is 46 for Pxl . On( , Pxl . Off( , Pxl . Change( , and pxl . Test( .