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concatenate vectors

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Miriam on 10 Nov 2011
Hi, let's say I have e.g. three column-vectors a(nx1), b(nx1), c(nx1) I want to concatinate them to have another column-vector (nx1) which has a,b,c inside one after another. How do I do this? Any help regarding that question is appreciated! Thanks in advance!

Answers (3)

Titus Edelhofer
Titus Edelhofer on 10 Nov 2011
Hi Miriam,
now with column vectors. Does this what you expect?
a = [1; 2];
b = [3; 4; 5];
c = [6; 7];
d = [a; b; c]
Miriam on 10 Nov 2011
I changed it in the question, thanks for the remark.
Titus Edelhofer
Titus Edelhofer on 10 Nov 2011
updated as well ;-)

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Walter Roberson
Walter Roberson on 10 Nov 2011
You cannot do that with numeric vectors. Numeric vectors do not permit nesting.
An nx1 vector is a column vector, by the way, not a row vector.
The code below creates an n x 1 cell array in which each entry is [a(k),b(k),c(k)]
NewArray = mat2cell([a,b,c], ones(1,length(a)), 3 );
I would, though, tend to think that likely whatever you are doing would be more easily done by creating an n x 3 array:
NewArray = [a,b,c];

William on 10 Nov 2011
Newvect = [a(nx1);b(nx1);c(nx1)]
Newvect = [a(nx1) b(nx1)c(nx1)]
or try
help strcat
help horzcat
  1 Comment
Miriam on 10 Nov 2011
ok great, that's it, thanks!

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