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Variables
Qualifying
variables
100
All apps have variables, that is, placeholders for various values
that are unique to a particular app. These include symbolic
expressions and equations, settings for the Plot and Numeric
views, and the results of some calculations such as roots and
intersections.
Suppose you are in Home view and want to retrieve the mean of
a data set recently calculated in the Statistics 1Var app.
1. Press
a
.
This opens the Variables menu. From here you can access
Home variables, user-defined variables, and app variables.
2. Tap
.
This opens a menu of app
variables.
3. Select Statistics 1Var
> results > MeanX.
The current value of the
variable you chose now
appears on the entry line. You can press
value. Or you can include the variable in an expression that
you are building. For example, if you wanted to calculate the
square root of the mean computed in the Statistics 1Var app,
you would first press
and then press
See appendix A, "Glossary", beginning on page 527 for a
complete list of app variables.
You can qualify the name of any app variable so that it can be
accessed from anywhere on the HP Prime. For example, both the
Function app and the Parametric app have an variable named
Xmin. If the app you last had open was the Parametric app and
enter Xmin in Home view, you will get the value of Xmin from the
Parametric app. To get the value of Xmin in the Function app
instead, you could open the Function app and then return to
Home view. Alternatively, you could qualify the name of the
variable by preceding it with the app name and a period, as in
Function.Xmin.
Sj
, follow steps 1 to 3 above,
E
.
E
to see its
An introduction to HP apps
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