MATLAB: How to combine 2 matrices (or vectors) element by element in order (with different sizes)

concatenate

How can I combine 2 matrices A and B into one so that the new matrix C = element 1 of A, followed by element 1 of B, then element 2 of A, element 2 of B, etc? Note that vectors A and B are randomly generated and the size might be different.

For example, A = [x1 x2 x3 …], B = [y1 y2 y3 …] and then C=[x1 y1 x2 y2 x3 y3 …]

Thank you.

Best Answer

A=1:3
B=4:6
C=[A;B]
C=C(:)'

%or

C=reshape([A;B],1,[])

Related Solutions

MATLAB: Element by Element Subtraction

Try this:

a= [1,2,3,4,5] 
b= [-1,-2,-3]
c = a' - b;
c = c(:)'

You get

c =
   2     3     4     5     6     3     4     5     6     7     4     5     6     7     8

in R2016b (I believe) or later that has automatic expansion capability.

MATLAB: How to rearrange rows in specific intervals

I use the Symbolic Math Toolbox to illustrate the approach and the desired result:

syms x1 y1 z1 x2 y2 z2 x3 y3 z3 real
M = [x1  y1  z1;
    x2  y2  z2;
    x3  y3  z3;
    x1  y1  z1;
    x2  y2  z2;
    x3  y3  z3;
    x1  y1  z1;
    x2  y2  z2;
    x3  y3  z3];
A = reshape(M, 3, 3, []);
B = permute(A, [3 2 1]);
Result = reshape(B, 3, [])'
Result =
[ x1, y1, z1]
[ x1, y1, z1]
[ x1, y1, z1]
[ x2, y2, z2]
[ x2, y2, z2]
[ x2, y2, z2]
[ x3, y3, z3]
[ x3, y3, z3]
[ x3, y3, z3]

Best Answer

Related Solutions

MATLAB: Element by Element Subtraction

MATLAB: How to rearrange rows in specific intervals

Related Question