
3. After all plot parameters are set, press ERASE DRfiW to draw the
plot. You will only see a portion of the plot in the display.
4. Press (4^(PICTURE) and use the arrow keys to scroll around and
view the larger plot. Press SICE! CTURE) again to exit scrolling
mode.
To use computed values for plotting or display ranges:
1. In the PLOT or PLOT OPTIONS form, highlight the range field
whose value you wish to compute.
2. Press (NXT 1 CALC to prepare for a side-calculation on the stack.
3. Perform the desired computation. For example, if you want to use
^ as one endpoint, you would press
4. If it is not already one, convert the result on level 1 to a real
number by pressing f^(-»NUM ).
5. Press OK to return the result to the original field.
24
Saving and Restoring Plots
A plot can consist of several components:
■ The plot picture, a graphic object.
■ The current equation or equations, stored in the reserved variable
EQ.
■ The current plot parameters, set in the PLOT forms, and stored in
the reserved variable PPAR and, in the case of three-dimensional
plot types, VPAR.
m Flag settings that determine plotting or display options.
You have the option to save any or all of these plot components in a
variable so that you may retrieve them at a later time. Here are two
useful approaches:
1. Save just the plot picture—the “result”—in a variable. This is a
simple procedure (see below) but each plot picture uses about one
Kilobyte of memory.
2. Save the current EQ, PPAR, VPAR (if necessary), and flag settings
in a list. The plot can be reconstructed by restoring each of these
to the values contained in the list.
24-6 Advanced Plot Options
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