How can I join two vectors?

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Larissa Rocha
Larissa Rocha on 18 Mar 2021
Commented: Larissa Rocha on 18 Mar 2021
I have two column vectors (nx1), and I need to concatenate them together end to end, to end up with another column vector that will be, let's say, (2n,1) size. I tried to use "cat" function like this:
cat(2,a,b)
Where "a" and "b" are column vectors, but it doesn't work as I was expecting, the same way it works when "a" and "b" are arrays: a=[1 2 3] and b=[4 5 6] for example. Is there a way to accomplish that?

Accepted Answer

the cyclist
the cyclist on 18 Mar 2021
Edited: the cyclist on 18 Mar 2021
It seems that you just got the dimension wrong. Down the column is dimension 1:
a = [2; 3; 5]; % col vector
b = [7; 11; 13]; % another col vector
c = cat(1,a,b) % concatenate vertically
c = 6×1
2 3 5 7 11 13
d = [a; b] % Another way to concatenate vertically
d = 6×1
2 3 5 7 11 13

More Answers (1)

Larissa Rocha
Larissa Rocha on 18 Mar 2021
I figured out that by using "vertcat" function I get the results wanted to. I'm not deleting the question in case it's another person's doubt too, this is what I did:
a = zeros(3,1)
b = ones(3,1)
c = vertcat(a,b)
%the result is c = (0,0,0,1,1,1) in one column

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