Introduction
This program plots the slope field for the differential equation in the
form .
If you have not used one of the programs posted on this website before,
you should read through
the information in the Intro to Programming
section first.
The Program
'SLOPEFIELD' | {' is in ALPHA} {This is the name of the program} |
Cls | {Cls is in SHIFT} |
7 (Xmax-Xmin) 83 H | {Xmin, Xmax are in VAR under RNG} { is on the , button} |
7 (Ymax-Ymin) 55 K | {Ymin, Ymax are in VAR under RNG} |
1 (0.4H)^2 E | { is the times sign} |
1 (0.4K)^2 F | |
Xmin + 0.5H X | |
Ymin + 0.5K Z | |
12L | |
Lbl 1 | {Lbl is in PRGM under JMP} |
8J | |
ZY | |
Lbl 2 | |
Y1T | {Y1 is in VAR under GPH, then followed by a 1} |
1 (E+F T^2) G | { is square root} |
T G S | |
Plot X-G, Y-S | {Plot is in SHIFT} |
Plot X+G, Y+S | |
Line | {Line is in SHIFT} |
Y+KY | |
Dsz J | {Dsz is in PRGM under JMP} |
Goto 2 | {Goto is in PRGM under JMP} |
X+HX | |
Dsz L | |
Goto 1 |
Running the Program
You will need to enter a function f(x,y) into
Y1 and adjust the RANGE accordingly
before running the program. To view the field after it is plotted use the
GT button.