Random walks – Sharp EL-9900 User Manual
Page 47
10
Basic Keyboard/PROGRAMMING USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
1.
Program the calculator to graph a random walk. A random walk can go in
any direction for a random distance. This program stops when the graph
tries to go outside the calculator display.
2.
Create a new program with the name WALK. Enter the following program
and remember to press ENTER at the end of each line. If you make a
mistake, use the calculator’s editing features to correct the error.
3.
Enter the following program using the Advanced Keyboard:
ClrDraw
2ndF
DRAW
A
1 ENTER
0
⇒D
0
STO
ALPHA D ENTER
.5
⇒X
.
5
STO X/
θ/T/n ENTER
.5
⇒Y
.
5 STO
ALPHA Y ENTER
Label A
PRGM B 0 1 ALPHA A
ENTER
.2(random–.5)
⇒H
. 2 (
MATH C 1 – . 5 )
STO
ALPHA H
ENTER
.2(random–.5)
⇒K
. 2 (
MATH
C 1 – . 5 )
STO
ALPHA K ENTER
Line(X,Y,X+H,
2ndF DRAW A 2 X/
θ/T/n , ALPHA
Y+K)
Y
, X/
θ/T/n + ALPHA H , ALPHA
Y + ALPHA K )
ENTER
X+H
⇒X
X/
θ/T/n + ALPHA H STO X/θ/T/n ENTER
Y+K
⇒Y
ALPHA Y + ALPHA K
STO ALPHA
Y ENTER
If X<0 Goto B
PRGM B 0 3 X/
θ/T/n MATH F
5
0 PRGM B
0 2 ALPHA B ENTER
If X>1 Goto B
PRGM B
0 3 X/
θ/T/n MATH F 3 1
PRGM B 0 2 ALPHA B
ENTER
If Y<0 Goto B
PRGM B 0
3 ALPHA Y MATH
F 5 0
PRGM
B 0 2
ALPHA B ENTER
RANDOM WALKS