Sharp EL-9900 Operation Manual page 121

Chapter 6: Advanced Graphing Features — Advanced Keyboard
7 PxlTST(
C ON/OFF Sets the visibility status of a given graph number (0-9).
1 DrawON
2 DrawOFF
PxlTST( column, row )
Returns "1" if a pixel point is present at a given screen
location indicated by column and row.
Returns "0" if no pixel point exists.
DrawON [ equation number 1 , ....] or DrawON
Sets the specified graphs visible. If no argument is
given, then all graphs will be set visible.
DrawOFF [ equation number 1 , ....] or DrawOFF
Sets the specified graphs invisible. If no argument is
given, then all graphs will be set invisible.
Example
• Set Y1 and Y2 to visible and Y3 to invisible.
1. Press @ d C 1.
2. Enter "1, 2" for equation numbers.
3. Press E.
4. Press @ d C 2.
5. Enter 3 for
equation number.
6. Press E.
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