MATLAB Functions

Concatenate arrays

C = cat(dim,A,B)
C = cat(dim,A1,A2,A3,A4...)

Description

C = cat(dim,A,B)

concatenates the arrays A and B along dim.

C = cat(dim,A1,A2,A3,A4,...)

concatenates all the input arrays (A1, A2, A3, A4, and so on) along dim.

cat(2,A,B) is the same as [A,B] and cat(1,A,B) is the same as [A;B].

Remarks

When used with comma separated list syntax, cat(dim,C{:}) or cat(dim,C.field) is a convenient way to concatenate a cell or structure array containing numeric matrices into a single matrix.

Examples

Given,

A =               B =
     1     2                   5     6
     3     4                   7     8

concatenating along different dimensions produces:

The commands

A = magic(3); B = pascal(3);
C = cat(4,A,B);

produce a 3-by-3-by-1-by-2 array.