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2 MATLAB 6.1 Release Notes

2-12

External Interfaces/API Features

Concatenation of Java Arrays

In MATLAB 6.1, you can concatenate arrays of Java objects that have unlike

dimensions. The following example concatenates a 2-by-3 array of

java.lang.Integer with a 4-by-3 array of the same class.

A =

java.lang.Integer[][]:

[ 1] [ 2] [ 3]

[ 4] [ 5] [ 6]

[17] [18] [19]

[20] [21] [22]

B =

java.lang.Integer[][]:

[11] [12] [13]

[14] [15] [16]

The vertical concatenation [A;B] is simple since both arrays have the same

number of columns. The horizontal concatenation

[A B] merges the two arrays

into an irregularly shaped array having six columns in the first and second

rows and three columns in the third and fourth rows.

C = [A;B] C = [A B]

C = C =

java.lang.Integer[][]: java.lang.Integer[][]:

[ 1] [ 2] [ 3] [6 element array]

[ 4] [ 5] [ 6] [6 element array]

[11] [12] [13] [3 element array]

[14] [15] [16] [3 element array]

[17] [18] [19]

[20] [21] [22]

Note “Concatenation of Java Objects” on page 2-30 discusses changes to how

Java objects are concatenated.

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