User's Manual

110 An introduction to HP apps

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

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

E to see its

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

Sj, follow steps 1 to 3 above,

and then press

See appendix A, “Glossary”, beginning on page 587 for a

complete list of app variables.

Qualifying

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.