HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 24
The MODES view, Numeric formats, you can change
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The MODES view The MODES view (see right) controls the numeric format used in displaying numbers and angles in aplets. At the bottom of the screen you will see that one of the screen keys has been given the function . Pressing this key pops up a menu of choices from which you can select the option which suits you. The default angle setting is radians. Calculator Tip If you don't want to use the menu then, rather than pressing , highlight the field and then press the '+' key repeatedly. This will cycle through the choices without popping up a menu. This can be much faster if the menu has only a few choices. Numeric formats The choices for 'Number format' are shown on the right. Standard is probably the best choice in most cases, although it can be a little annoying to constantly have 12 significant figures displayed. In Standard mode, very large and very small numbers are displayed in scientific notation. The Fixed, Scientific and Engineering formats all require you to specify how many decimal places to display. The screenshot right shows Fixed 4, which rounds everything off to 4 decimal places. Of course, you can change the 4 to any other number you want. A setting of Scientific ensures that any results are displayed in scientific notation. Of course, the calculator's idea of scientific notation may not be the same as yours. Since the calculator has no way of displaying powers as superscripts, a result of 3⋅ 203×104 has to be displayed as 3.203E4. The alternative of Engineering is very similar to Scientific, except that powers are displayed as multiples of 3 (ie. 103,106 ). This is done to allow easy conversion in the metric system, which also works in multiples of 1000. 24