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Chapter 3: Function Graphing 80
Panning to the Left or Right
If you trace a function beyond the left or right side of the screen, the viewing window automatically
pans to the left or right.
Xmin and Xmax are updated to correspond to the new viewing window.
Quick Zoom
While tracing, you can press Í to adjust the viewing window so that the cursor location
becomes the center of the new viewing window, even if the cursor is above or below the display.
This allows panning up and down. After Quick Zoom, the cursor remains in TRACE.
Leaving and Returning to TRACE
When you leave and return to TRACE, the trace cursor is displayed in the same location it was in
when you left TRACE, unless Smart Graph has replotted the graph.
Using TRACE in a Program
On a blank line in the program editor, press r. The instruction
Trace is pasted to the cursor
location. When the instruction is encountered during program execution, the graph is displayed
with the trace cursor on the first selected function. As you trace, the cursor coordinate values are
updated. When you finish tracing the functions, press Í to resume program execution.
Exploring Graphs with the ZOOM Instructions
ZOOM Menu
To display the
ZOOM menu, press q. You can adjust the viewing window of the graph quickly
in several ways. All ZOOM instructions are accessible from programs.
ZOOM MEMORY
1: ZBox
Draws a box to define the viewing window.
2: Zoom In
Magnifies the graph around the cursor.
3: Zoom Out
Views more of a graph around the cursor.
4: ZDecimal Sets @X and @Y to 0.1.
5: ZSquare
Sets equal-size pixels on the X and Y axes.
6: ZStandard
Sets the standard window variables.
7: ZTrig
Sets the built-in trig window variables.
8: ZInteger
Sets integer values on the X and Y axes.
9: ZoomStat
Sets the values for current stat lists.
0: ZoomFit
Fits YMin and YMax between XMin and XMax.
A: ZQuadrant1
Displays the portion of the graph that is in quadrant 1
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