Function obj, Function obj ,9-19 – HP 50g Graphing Calculator User Manual

Page 296

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Page 9-19

In this section we will showing you ways to transform: a column vector into a
row vector, a row vector into a column vector, a list into a vector, and a vector
(or matrix) into a list.

We first demonstrate these transformations using the RPN mode. In this mode,
we will use functions OBJ ,

LIST, ARRY and DROP to perform the

transformation. To facilitate accessing these functions we will set system flag
117 to SOFT menus (see Chapter 1). With this flag set, functions OBJ ,

ARRY, and LIST will be accessible by using

„° @)TYPE!. Functions

OBJ ,

ARRY, and LIST will be available in soft menu keys

A, B, and

C. Function DROP is available by using „°@)STACK @DROP.

Following we introduce the operation of functions OBJ ,

LIST, ARRY, and

DROP with some examples.

Function OBJ

This function decomposes an object into its components. If the argument is a
list, function OBJ will list the list elements in the stack, with the number of
elements in stack level 1, for example:

{1,2,3} ` „°@)TYPE! @OBJ @

results in:

When function OBJ is applied to a vector, it will list the elements of the vector
in the stack, with the number of elements in level 1: enclosed in braces (a list).
The following example illustrates this application:

[1,2,3] `

„°@)TYPE! @OBJ @ results in:

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