MATLAB BUILDER JA 2 Guide de l'utilisateur télécharger pdf (Page 146)

4 Using MWArra y Classes

(1,4) 16.0000 +41.0000i

(2,5) 0 + 2.0000i

Example — Using newSparse with Row and Column Indices

Construct a sparse MWNumericArray from vector Adata:

double[] Adata = { 0, 10, 0, 0, 40, 50, 60, 0, 0, 90};

int[] ri = {1, 1, 1, 1, 1, 2, 2, 2, 2, 2};

int[] ci = {1, 2, 3, 4, 5, 1, 2, 3, 4, 5};

MWNumericArray A = MWNumericArray.newSparse(ri, ci,

Adata, MWClassID.DOUBLE);

System.out.println("A = " + A.toString());

When run, the example displays this output:

(2,1) 50

(1,2) 10

(2,2) 60

(1,5) 40

(2,5) 90

Example — Assigning Multiple Values to a Single Array Element

Create a sparse MWNumericArray using the rowindex and colindex

arguments, specifying multiple values for the array element at index (2, 5).

The result is that this element stores the sum of the values from

Adata(1),

Adata(7), Adata(8),andAdata(9), which is equal to 250.

double[] Adata = { 0, 10, 0, 0, 40, 50, 60, 70, 80, 90};

int[] ri = {1, 2, 1, 1, 1, 2, 2, 2, 2, 2};

int[] ci = {1, 5, 2, 3, 5, 1, 2, 5, 5, 5};

MWNumericArray A =

MWNumericArray.newSparse(ri, ci, Adata, 4, 5,

MWClassID.DOUBLE);

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MATLAB BUILDER JA 2 Guide de l'utilisateur Page 146