HP 50G, User Manual

Page: 296 / 887

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: