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Glossary 589
matrix A two-dimensional array of real or
complex numbers enclosed by square
brackets. Matrices can be created
and manipulated by the Matrix Editor
and stored in the Matrix Catalog.
Vectors are also handled by the
Matrix Catalog and Editor.
menu A choice of options given in the
display. It can appear as a list or as a
set of touch buttons across the bottom
of the display.
note Text that you write in the Note Editor.
It can be a general, standalone note
or a note specific to an app.
open
sentence
An open sentence consists of two
expressions (algebraic or arithmetic),
separated by a relational operator
such as =, <, etc. Examples of open
sentences include y
2
<x
−1
and
x
2
−y
2
=3+x.
program A reusable set of instructions that you
record using the Program Editor.
variable A name given to an object—such as
a number, list, matrix, graphic and so
on—to assist in later retrieving it. The
command assigns a variable,
and the object can be retrieved by
selecting the associated variable from
the variables menu (
a).
vector A one-dimensional array of real or
complex numbers enclosed in single
square brackets. Vectors can be
created and manipulated by the
Matrix Editor and stored in the Matrix
Catalog.
views The primary environments of HP apps.
Examples of app views include Plot,
Plot Setup, Numeric, Numeric Setup,
Symbolic, and Symbolic Setup.