HP 39g+, Руководство пользователя

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13-10 Matrices
•
Functions always produce and display a result. They
do
not change any stored variables, such as a matrix
variable.
•
Functions have arguments that are enclosed in
parentheses and separated by commas; for example,
CROSS
( vector1 , vector2 ). The matrix input can be
either a matrix variable name (such as
M1
) or the
actual matrix data inside brackets. For example,
CROSS(M1,[1,2])
.
About commands
Matrix commands are listed in the CMDS menu (
CMDS
), in the matrix category.
See “Matrix commands” on page 16-23 for details of the
matrix commands available for use in programming.
Functions differ from commands in that a function can be
used in an expression. Commands cannot be used in an
expression.
Argument conventions
•
For row# or column# , supply the number of the row
(counting from the top, starting with 1) or the number
of the column (counting from the left, starting with 1).
•
The argument matrix can refer to either a vector or a
matrix.
Matrix functions
COLNORM
Column Norm. Finds the maximum value (over all
columns) of the sums of the absolute values of all elements
in a column.
COLNORM
( matrix )
COND
Condition Number. Finds the 1-norm (column norm) of a
square
matrix .
COND
( matrix )
CROSS
Cross Product of vector1 with vector2 .
CROSS
( vector1 , vector2 )