II. Setting a Window - Finding One That Works

A. Overview

2. ZOOM

The ZOOM menu offers you several preset windows. There are many times when one of these windows will work well with the function you are graphing.

 

1: ZBox This allows you to box in a
particular area of the graph.
2: Zoom In Zooms in with the center at the
point of the cursor.
The default factor is 4.
3: Zoom Out Zooms out with the center at the
point of the cursor.
The default factor is 4.
4: ZDecimal This is one of the most useful windows.
It is also called a friendly window because
the TRACE key will move in increments
of 0.1 with this window. The window
size is X:[-4.7,4.7] and Y:[-3.1, 3.1].
5: ZSquare Adjusts Xmin and Xmax so that the
ticks are the same distance apart on both axes.
6: ZStandard This is also a useful window. The window
size is X:[-10, 10] and Y:[-10, 10]. However,
the TRACE does not move in increments of 0.1.
7: ZTrig Sets the window to .
8: ZInteger Redefines the window to Xscl=10 and Yscl=10.
9: ZoomStat Gives a window that shows all
statistical data points.
10: ZoomFit Sets a window that shows the maximum
and minimum value of Y with the given X window.

Some of these presets can give you some strange results, so it is best to use just ZDecimal or ZStandard until you become more proficient when setting windows. Several of these are used in the examples in section B of this module.