cat
Concatenate symbolic arrays along specified dimension
Syntax
Description
Examples
Concatenate Two Vectors into Matrix
Create vectors A
and B
.
A = sym('a%d',[1 4]) B = sym('b%d',[1 4])
A = [ a1, a2, a3, a4] B = [ b1, b2, b3, b4]
To concatenate A
and B
into a matrix, specify
dimension dim
as 1
.
cat(1,A,B)
ans = [ a1, a2, a3, a4] [ b1, b2, b3, b4]
Alternatively, use the syntax [A;B]
.
[A;B]
ans = [ a1, a2, a3, a4] [ b1, b2, b3, b4]
Concatenate Two Vectors into One Vector
To concatenate two vectors into one vector, specify dimension
dim
as 2
.
A = sym('a%d',[1 4]); B = sym('b%d',[1 4]); cat(2,A,B)
ans = [ a1, a2, a3, a4, b1, b2, b3, b4]
Alternatively, use the syntax [A B]
.
[A B]
ans = [ a1, a2, a3, a4, b1, b2, b3, b4]
Concatenate Multidimensional Arrays Along Their Third Dimension
Create arrays A
and B
.
A = sym('a%d%d',[2 2]); A(:,:,2) = -A B = sym('b%d%d', [2 2]); B(:,:,2) = -B
A(:,:,1) = [ a11, a12] [ a21, a22] A(:,:,2) = [ -a11, -a12] [ -a21, -a22] B(:,:,1) = [ b11, b12] [ b21, b22] B(:,:,2) = [ -b11, -b12] [ -b21, -b22]
Concatenate A
and B
by specifying dimension
dim
as 3
.
cat(3,A,B)
ans(:,:,1) = [ a11, a12] [ a21, a22] ans(:,:,2) = [ -a11, -a12] [ -a21, -a22] ans(:,:,3) = [ b11, b12] [ b21, b22] ans(:,:,4) = [ -b11, -b12] [ -b21, -b22]