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2. Display and clear the Y= Editor. Then define
the 1st-order differential equation:
y1'(t)=.001y1…(100Ny1)
Press p to enter the … shown above. Do not
use implied multiplication between the
variable and parentheses. If you do, it is
treated as a function call.
Leave the initial condition yi1 blank.
Note: With y1' selected, the device will
graph the y1 solution curve, not the
derivative y1'.
Press 8 # , 8 ¸ ¸ .001 Y1 p c
100 | Y1 d ¸
3. Display the
GRAPH FORMATS dialog box.
Then set Axes = ON, Labels = ON, Solution
Method = RK
, and Fields = SLPFLD.
Note: To graph one differential equation,
Fields must be set to SLPFLD or FLDOFF. If
Fields=DIRFLD, an error occurs when you
graph.
@8 Í D D B 2 D D B 2 D B 1 D B 1
¸
4. Display the
Window Editor, and set the
Window variables as shown to the right.
Press 8 $ 0 D 10 D .1 D 0 D ? 10 D
110 D 10 D ? 10 D 120 D 10 D 0 D .001
D 20
5. Display the Graph screen.
Because you did not specify an initial
condition, only the slope field is drawn (as
specified by Fields=SLPFLD in the GRAPH
FORMATS
dialog box).
Press 8 %
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