HP Prime Graphing NW280AAABA manual Qualifying variables

Qualifying variables

Some app variable names are shared by multiple apps. For example, the Function app has a variable named Xmin, but so too does the Polar app, the Parametric app, the Sequence app, and the Solve app. Although named identically, these variables usually hold different values. If you attempt to retrieve the contents of a variable that is used in more than one app by entering just its name in Home view, you will get the contents of that version of the variable in the current app. For example, if the Function app is active and you enter Xmin in Home view, you will get the value of Xmin from the Function app. If you want the value of Xmin from, say, the Sequence app, you must qualify the variable name. Enter Sequence.Xmin to retrieve the value of Xmin from the Sequence app.

In the figure to the right, the value of Xmin from the Function app was retrieved first (–10.4…). The qualified variable name entered second retrieved the value of Xmin from the Sequence app (–1.8).

Note the syntax required: app_name.variable_name.

The app can be any of the 18 HP apps, or one you have created based on a built-in app. The name of the app variable must match a name listed in the app variables tables below. Spaces are not allowed in an app name and must be represented by the underscore character: SX.

Tip Non-standard characters in variables name—such as Σ and σ—can be entered by selecting them from the special symbols palette (Sr) or from the characters menu (Sa).

Variables 427