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A. Overview
2. ZOOM
The ZOOM menu offers you several preset windows and numerous other options. In this section, we will look only at some of the preset windows. There are many times when one of these options will work well with the function you are graphing. To access the ZOOM menu, press
. Notice the small arrow at the far right of the menu. This means that the menu has more options, and you can access these by pressing the
key.
| BOX | This allows you to box in a particular area of the graph. |
| ZIN | Zooms in with the center at the point
of the cursor. The default factor is 4. |
| ZOUT | Zooms out with the center at the point
of the cursor. The default factor is 4. |
| ZSTD | This is also a useful window. The window size is X:[-10, 10] and Y:[-10, 10]. |
| ZPREV | Changes the window to the previous settings. |
| ZFIT | Sets a window that shows the maximum
and minimum value of Y with the given X window. |
| ZSQR | Adjusts Xmin and Xmax so that the ticks
are the same distance apart on both axes. |
| ZTRIG | Must be in radians. Preset to a window
that is good for elementary trig functions. |
| ZDECM | 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:[-6.3,6.3] and Y:[-3.1, 3.1]. |
| ZDATA | Gives a window that shows all statistical data points. |
| ZRCL |
You can define zoom-window variables using
|
| ZFACT | Brings up the ZOOM FACTORS screen. |
| ZOOMX | Zooms out by a factor of xFact only and disregards yFact. |
| ZOOMY | Zooms out by a factor of yFact only and disregards xFact. |
| ZINT | Redefines the window to Xscl=10 and Yscl=10. |
| ZSTO | Stores the current window values that
can be recalled using ZRCL. |
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.
