How Can I union four non-equal size vector in matlab?

Hi I want to write Finite element MATLAB code. I want to union 4 vectors that they are different in their sizes. I used "unique" command, however; My program has this Error:

"Error using horzcat Dimensions of matrices being concatenated are not consistent."

Answer 1

[Andrei Bobrov]

A=[1 2 3 4 5];
B=[7 4 5];

C=unique([A(:);B(:)])

[Jamal]

thank u very much.

Answer 2

[Mohammad Monfared]

To union two vectors they should be of the same kind, row vectors or column vectors.

if they are row vectors;

 v=[v1, v2];

if they are column vectors:

 v=[v1; v2];

[Jamal]

they are not the same.how can I union two different non- equal size with matlab?

[Mohammad Monfared]

In this case size does not matter and you can switch between column and row vector as:

 v=v' ;

two additional functions are also available which are isrow() and iscolumn(). They are useful when you don't know if a vector is in row or column shape.

[Jamal]

for Example: A=[1 2 3 4 5] B=[7 4 5] union array that I want C=[1 2 3 4 5 7]

C=unique([A,B])

however, I received Error from Matlab, because they are not consistent.