NAME
SPVM::Matrix::Double - double Matrix
SYNOPSYS
my $values = new double[10]; my $rows_length = 2; my $columns_length = 3; my $matrix = SPVM::Matrix::Double->new($values, $rows_length, $columns_length);
Accessors
my $values = $matrix->values; my $rows_length= $matrix->rows_length; my $columns_length = $matrix->columns_length;
DESCRIPTION
SPVM::Matrix::Double is double Matrix.
METHODS
new : SPVM::Matrix::Double ($values : ${element_type}[], $rows_length: int, $columns_length : int)
my $values = new double[10]; my $rows_length = 2; my $columns_length = 3; my $matrix = SPVM::Matrix::Double->new($values, $rows_length, $columns_length);
Arguments:
1. Values. this value is set to values field. Note that the reference is set to values field not creating new array which elements is copied from argument array.
2. Row. This value is set to rows_length field.
3. Column. This value is set to columns_length field.
Return Value:
Matrix object.
Exception:
1. If Values is not defined, a exception occurs.
2. If Values length is different from Row * Column, a exception occurs.
values : ${element_type}[] ()
my $values = $matrix->values;
Get values field. Note that get the reference of values field not creating new array which elements is copied from values field.
rows_length : int ()
my $rows_length= $matrix->rows_length;
Get rows_length field.
columns_length : int ()
my $columns_length = $matrix->columns_length;
Get columns_length field.
to_string : string ()
my $string = $matrix->to_string;
Convert Matrix Content to String. Each column is joined 1 space and Each row is end with \n
1 3 5 2 4 6
Matrix Features
Values is always defined
values field is alway defined after new matrix object.
Array length of Values is always Row length * Column length
The array length of values is always rows_length field * columns_length field.
Column-major
Matrix is Column-major.
# Matrix # $x11 $x12 $x13 # $x21 $x22 $x23 my $values = [$x11, $x21, $x12, $x22, $x13, $x23]; my $rows_length= 2; my $columns_length = 3; my $matrix = SPVM::Matrix::Double->new($values, $rows_length, $columns_length);
Imutable Things
The following fields is imutable.
1. values field
2. rows_length field
3. columns_length field
Mutable Things
The following thing is mutable.
1. Each value of values field.
# Can set each value of values field. $matrix->values->[0] = $x11;