MATLAB BUILDER JA 2 Podręcznik Użytkownika Pobierz pdf (Strona 246)

5 Sample Applications (Java)

Matrix Math Example

The purpose of the example is to show you the following:

• How to assign more than one MATLAB function to a component class.

• How to manually handle native memory management.

• How to a ccess the component in a Java a pplication (

getfactor.java)by

instantiating

Factor and using the MWArray class library to handle data

conversion.

Note For complete reference inform atio n about the MWArray class

hierarchy, see the

com.mathworks.toolbox.javabuilder package.

• How to bui ld and run the MatrixMathDemoApp application

This example builds a Java component to perform matrix math. The example

creates a program that performs C holesky, LU, and QR factorizations on a

simple tridiagonal m atrix (finite difference matrix) with the following form:

A=[2-1000

-12-100

0-1 2-1 0

00-12-1

000-12]

Yousupplythesizeofthematrixonth e command line, an d the progra m

constructs the matrix and performs the three factorizations. T he original

matrix and the results are printed to standard output. You may optionally

perform the calculations using a sparse matrix by specifying the string

"sparse" as the secon d parameter on the command line.

MATLAB Functions to Be Encapsulated

The following code defines the MATLAB functions used in the example.

cholesky.m

function [L] = cholesky(A)

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MATLAB BUILDER JA 2 Podręcznik Użytkownika Strona 246