HP (Hewlett-Packard) 50g ユーザーズマニュアル

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Θ PIX? Checks if pixel at location (x,y) or {#n, #m} is on.
Θ PIXOFF turns off pixel at location (x,y) or {#n, #m}.
Θ PIXON turns on pixel at location (x,y) or {#n, #m}.

This command takes as input the coordinates of a point as user coordinates 
(x,y) or pixels {#n, #m}, and places the contents of PICT with the upper left 
corner at the location of the point specified.   You can also use an empty list as 
argument, in which case the picture is centered in the screen.  PVIEW does not 
activate the graphics cursor or the picture menu.  To activate any of those 
features use PICTURE.

The function PX

C converts pixel coordinates {#n #m} to user-unit coordinates 

(x,y).

The function C

PX converts user-unit coordinates (x,y) to pixel coordinates {#n 

#m}.

In this section we use the commands described above to produce graphics with 
programs.  Program listing are provided in the attached diskette or CD ROM.

Example 1 - A program that uses drawing commands
The following program produces a drawing in the graphics screen.  (This 
program has no other purpose than to show how to use calculator commands to 
produce drawings in the display.)

«

Start  program

DEG 

Select degrees for angular measures

0. 100. XRNG 

Set x range

0. 50.  YRNG

Set y range

ERASE

Erase picture

(5., 2.5) (95., 47.5) BOX

Draw box from (5,5) to (95,95)

(50., 50.) 10. 0. 360. ARC

Draw a circle center (50,50), r =10.