Add new column a vector.

Asked by Artyom on 12 Jul 2012

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Hi everyone. I have some vector for example x=[0;0;2;2;1;0;0;2;0]. How can I add a new vector (for example y=[43;43;34;34;34]) to a second column of vector x, so it becomes x=[0;0;2;2;1;0;0;2;0 43;43;34;34;34]?

2 Comments

Jan on 12 Jul 2012

"x=[0;0;2;2;1;0;0;2;0 43;43;34;34;34]" is not a valid Matlab array. What size do you want for "x"? How do you want to handle the different lengths? The result must be rectangular.

Artyom on 12 Jul 2012

I don't know the size of matrix x. On each iteration I need to add a new number in the second column.

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Answer by Ryan on 12 Jul 2012

Accepted Answer

 x = [0;0;2;2;1;0;0;2;0];
 y = [43;43;34;34;34];
 Combined{1} = x;
 Combined{2} = y;

You need to use cells {} in order to store vectors of different sizes in one array.

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Answer by Sebastian Holmqvist on 12 Jul 2012

x = [0 0 2 2 1 0 0 2 0]';
y = [43 43 34 34 34 0 0 0 0]'; % Must be of same length

You could either

cat(2, x, y)

or simply

ans = [x y]

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Answer by Jan on 12 Jul 2012

See FEX: padcat and FEX: catpad.

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