Creating Your Own User-Defined Units; Why Use Your Own Units? - Texas Instruments TITANIUM TI-89 User Manual

• If the defaults are
with units.
_acre
• If you set
Area = NONE
NONE is not available for base categories such as
Note:
components.

Creating Your Own User-Defined Units

Creating Your Own User-Defined Units
Creating Your Own User-Defined Units Creating Your Own User-Defined Units
In any category, you can expand the list of available units by defining a new unit in terms
of one or more pre-defined units. You can also use "standalone" units.

Why Use Your Own Units?

Why Use Your Own Units?
Why Use Your Own Units? Why Use Your Own Units?
Some example reasons to create a unit are:
• You want to enter length values in dekameters. Define 10_m as a new unit named
_dm.
• Instead of entering _m/_s
units as a single unit named _ms2.
• You want to calculate how many times someone blinks. You can use _blinks as a
valid unit without defining it. This "standalone" unit is treated similar to a variable that
is not defined. For instance, 3_blinks is treated the same as 3a.
If you create a user-defined unit for an existing category, you can select it from the
Note:
UNITS dialog box menu. But you cannot use 3 to select the unit as a default for
displayed results.
Constants and Measurement Units
and
Area = _acre Length = _m
, area results are shown with
2
as an acceleration unit, you define that combination of
(meters), area results are shown
2
units.
_m
and
Length Mass
that have no
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