Operation Manual

Chapter 3: Function Graphing 90
ZFrac1/10
ZFrac1/10 replots the functions immediately. It updates the window variables to preset values, as shown
below.
Using ZOOM MEMORY
ZOOM MEMORY Menu
To display the ZOOM MEMORY menu, press q ~.
ZPrevious
ZPrevious replots the graph using the window variables of the graph that was displayed before you
executed the last ZOOM instruction.
ZoomSto
ZoomSto immediately stores the current viewing window. The graph is displayed, and the values of the
current window variables are stored in the user-defined
ZOOM variables ZXmin, ZXmax, ZXscl, ZYmin,
ZYmax, ZYscl, and ZXres.
These variables apply to all graphing modes. For example, changing the value of
ZXmin in Func mode
also changes it in Par mode.
ZoomRcl
ZoomRcl graphs the selected functions in a user-defined viewing window. The user-defined viewing
window is determined by the values stored with the
ZoomSto instruction. The window variables are
updated with the user-defined values, and the graph is plotted.
ZOOM FACTORS
The zoom factors, XFact and YFact, are positive numbers (not necessarily integers) greater than or
equal to 1. They define the magnification or reduction factor used to
Zoom In or Zoom Out around a
point.
Checking XFact and YFact
To display the ZOOM FACTORS screen, where you can review the current values for XFact and YFact,
select
4:SetFactors from the ZOOM MEMORY menu. The values shown are the defaults.
[Xmin, Xmax] Xscl [Ymin, Ymax] Yscl Xres @X @Y TraceStep
FULL [-33/4, 33/4] 1 [-41/8, 41/8] 1 1 1/16 1/16 1/8
HORIZONTAL [-33/4, 33/4] 1 [-5/2, 5/2] 1 1 1/16 1/16 1/8
GRAPH-TABLE [-23/4, 23/4] 1 [-9/2, 9/2] 1 1 1/16 1/16 1/8
[Xmin, Xmax] Xscl [Ymin, Ymax] Yscl Xres @X @Y TraceStep
FULL [-33/5, 33/5] 1 [-41/10, 41/10] 1 1 1/20 1/20 1/10
HORIZONTAL [-33/5, 33/5] 1 [-2, 2] 1 1 1/20 1/20 1/10
GRAPH-TABLE [-23/5, 23/5] 1 [-18/5, 18/5] 1 1 1/20 1/20 1/10
ZOOM MEMORY
1: ZPrevious
Uses the previous viewing window.
2: ZoomSto
Stores the user-defined window.
3: ZoomRcl
Recalls the user-defined window.
4: SetFactors...
Changes Zoom In and Zoom Out factors.