MATLAB BUILDER JA 2 Guide de l'utilisateur télécharger pdf (Page 78)

4 Using MWArra y Classes

Guidelines for Wo rking with MWArray Classes

Overview of the MWArray API

The MWArray Java API is a class hierarchy that represents the major

MATLAB array types. The root class is

MWArray, which has the following

subclass es:

•

MWNumericArray

• MWLogicalArray

• MWCharArray

• MWCellArray

• MWStructArray

These subclasses provide constructors and factory methods for creating n ew

MATLAB arrays from standard Java types and objects. You can use these

MATLAB arrays as argu m en ts in me tho d calls.

Note To improve performance, MWArrays are designed so that they cannot be

resized or reshaped once they are created.

Understanding the MWArray Base Class

MWArray stores a reference to a native MATLAB array and provides a set of

methods for accessing the array’s properties and data.

MWArray also provides

methods for converting the MATLAB array to standard Java types from the

outputsofaJavaclassmethodcall.

Accessing Elements of the Arrays

You cannot access the underlying MATLAB array’s data buffers directly.

Instead use

set and get methods to retrieve or modify an element of the

array. The

set and get m ethods support simple indexing through a single

subscript (value at offset) or you can supply an array of

int representing the

indices of the requested value. In the case of structure arrays, i ndexing by

fieldnameisalsosupported.

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MATLAB BUILDER JA 2 Guide de l'utilisateur Page 78