Next: The root-element Up: Elements of the Fib Previous: Set-element   Contents   Index

## Matrix element

The matrix element represents a matrix. The matrix element works similar to the set element, except that a number of counter variables is generated automatically.

Syntax:

Description of the elements:

• : Number of dimensions of the matrix ()
• : Number of values per set of values ()
• : Number of sets, with which the variables are set ()
• : The variables, which the matrix element defines
• : This is the number of the domain for the matrix element. This information is optional, the default value is 0. If no matrix domain with that number exist, the matrix domain with the next smallest number is used. By using different, adapted for each matrix element, domains, the memory requirements for storing in the compressed Fib format can be optimized.
• : vector for the area for the (/ matrix size in) dimension
• : Start value of the counter variable for the 'th dimension
• : End value for the counter variable for the 'th dimension
• with and : This are the to set values or variables, whith values to set
• : Vector of the to set values
• : The subobject, for which the variables are defined and which will be evalued for every variable assignment.

The matrix element represents a matrix with dimensions, which elements are sets of values.

In the matrix element each dimension / counter / index variable (with ) goes through all integers of the corresponding area to . For each integer value of the all integer values of the variable will be set. For each value allocation of the dimension variables the value variables will be set to the next set of values . This continues until either the dimension variables have gone through all of their values or there is no next set of values . If an element is a variable, so the will be assigned according to the value of the variable .

If there are no value variables (), just all the values of the dimension variables will be set and the sets of values will be ignored.

In listing 1 the operation of the matrix element is shown with C-pseudo code.

Example:

• : In this example the variables , and will be set for the subobject sequentially to the values: , , , , , , , ,
• : In this example the variables and will be set sequentially to the values: , , end, because no other assignments for exists
• : The variables and will be set sequentially to the values: , end, because no other assignments for exists to be set
• : The variables and will be set sequentially to the values: , , , , ,

Note: Matrices and vectors (one-dimensional matrices) are often used in mathematics, computer science, image processing. With the matrix element for example subimages can directly be specified as a raster image or the values of a flow chart can be given directly.

Next: The root-element Up: Elements of the Fib Previous: Set-element   Contents   Index
Betti Ã–sterholz 2013-02-13