Hp 39g Graphing Calculator Instrukcja Użytkownika Pobierz pdf (Strona 228)

FREEZE

LINE

PIXOFF

PIXON

TUNE

Halts the program, freezing the curi'ent display. Execution

resumes when any key is pressed.

Draws a line from (.i7, yl) to (.v2, y2).

LINE A7;y7;x2;y2;

Turns off the pixel at the specified coordinates (x,y).

PIXOFF A ;y:

Turns on the pixel at the specified coordinates (x,y).

PIXONa;>’:

Toggles the pixels along the line from (a/, yl) to (a2, y2) on

and off. Any pixel that was turned off, is turned on; any pixel

that was turned on, is turned off. TLINE can be used to erase

a line.

ThlNE xl ;yl ;x2;y2:

Example

TLINE 0;0;3;3:

Erases previously drawn 45 degree line from (0,0) to

(3,3), or draws that line if it doesn’t already exist.

Graphic commands

The Graphic commands use the graphics variables GO through

G9—or the Page variable from Sketch—as graphicname

arguments. The position argument takes the form (a,v).

Position coordinates depend on the cun'ent aplet's scale,

which is specified by Xmin, Xmax, Ymin, and Ymax. The

upper left comer of the target graphic {graphic!) is at

(Xmin, Ymax).

You can capture the current display and store it in GO by

simultaneously pressing fONl+| PLOT|.

DISPLAY-^

^DISPLAY

Stores the current display in graphicname.

DISPLAY—> graphicname

Displays graphic from graphicname in the display.

—^DISPLAY graphicname

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Programming

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Hp 39g Graphing Calculator Instrukcja Użytkownika Strona 228