„ô (simultaneously, if in RPN mode) to enter PLOT environment
Highlight the field in front of TYPE, using the —˜keys.
@CHOOS, and highlight Diff Eq, using the —˜keys. Press @@OK@@.
Change field F: to 'EXP(- t^2)'
Make sure that the following parameters are set to: H-VAR: 0, V-VAR:
Change the independent variable to t .
Accept changes to PLOT SETUP: L @@OK@@
„ò (simultaneously, if in RPN mode).
Change the horizontal and vertical view window to the following settings:
Also, use the following values for the remaining parameters: Init: 0, Final:
5, Step: Default, Tol: 0.0001, Init-Soln: 0
To plot the graph use: @ERASE @DRAW
When you observe the graph being plotted, you'll notice that the graph is not
very smooth. That is because the plotter is using a time step that may be a bit
large for a smooth graph. To refine the graph and make it smoother, use a step
of 0.1. Press @CANCL and change the Step : value to 0.1, then use @ERASE @DRAW
once more to repeat the graph. The plot will take longer to be completed, but
the shape is definitely smoother than before. Try the following: @EDIT L @LABEL
@MENU to see axes labels and range.
Notice that the labels for the axes are shown as 0 (horizontal, for t) and 1
(vertical, for x). These are the definitions for the axes as given in the PLOT
SETUP window („ô) i.e., H-VAR: 0, and V-VAR: 1. To see the graphical
solution in detail use the following:
To enter PLOT WINDOW