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An introduction to HP apps
All settings, definitions, and results, for all apps, are stored
as variables. Many of these variables can be incorporated
into a symbolic definition. To access app variables, press
a
, tap
variable, and then select the variable of interest. You could,
for instance, have a definition that reads
+X–Root. The value of the last root calculated in
2
F2(X)=X
the Function app is substituted for Root when this definition
is evaluated.
App variables are discussed in detail in chapter 28,
"Troubleshooting", beginning on page 507.
From math functions
•
Some of the functions on the Math menu can be
incorporated into a definition. The Math menu is one of the
Toolbox menus (
math function (Size) with a Home variable (L1):
–SIZE(L1). It is equivalent to x
2
F4(X)=X
the number of elements in the list named L1. (Size is an
option on the List menu, which is a sub-menu of the Math
menu.)
From CAS functions
•
Some of the functions on the CAS menu can be incorporated
into a definition. The CAS menu is one of the Toolbox menus
(
). The following definition incorporates the CAS
D
function irem: F5(X)=X
entered by choosing Remainder, an option on the
Division menu, which is a sub-menu of the Integer menu.
Note that any CAS command or function selected to operate
outside the CAS is given the CAS. prefix.)
From app functions
•
Some of the functions on the App menu can be
incorporated into a definition. The App menu is one of the
Toolbox menus (
the app function PredY:
2
F9(X)=X
+Statistics_2Var.PredY(6).
From the Catlg menu
•
Some of the functions on the Catlg menu can be
incorporated into a definition. The Catlg menu is one of the
Toolbox menus (
, select the app, select the category of
D
). The following definition combines a
+CAS.irem(45,7). (irem is
2
). The following definition incorporates
D
D
). The following definition incorporates
– n where n is
2
73
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