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Guidelines for Working with MWArray Classes

Method Usage

set(int, Object)

Replaces the element at the one-based index with the

supplied value (inherited from

MWArray).

set(int[],

Object)

Replaces the element at the one-based index array

with the supplied value (inherited from

MWArray).

The set methods replace the cell at the specified i ndex with the supplied

value. ThecellvaluecanbepassedasanysupportedJavatypeorasan

MWArray insta nce. W hen the cell v alue is passed as a Java type, the value is

converted to a MATLAB array using default conversion rules. When the value

is passed as a n

MWArray, the cell is assigned a shared copy of the underlying

MATLAB array.

Using getCell. The

getCell methods return an MWArray in sta n ce of th e

proper subclass type representing a shared copy of the underlying cell. The

array returned by

getCell should be disposed of when it is no longer needed.

This is the m ost efficient way of accessing a cell, because an

MWArray object is

created to encapsulate a shared copy of the underlying array. This process is

significantly more efficient than converting the entire a rray to a Java array

each ti me you access the cell. The ne xt example prints informatio n about a

cell array to standard output:

void printCellInfo(MWCellArray a)

{

if (a == null)

return;

MWArray c = null;

int n = a.numberOfElements();

System.out.println("Number of elements: " + n);

try

{

for (int k = 1; k <= n; k++)

{

c = a.getCell(k);

System.out.println("cell: " + k + " type: " +

a.classID());

c.dispose();

c = null;

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MATLAB BUILDER JA 2 Guida Utente Pagina 111

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