Adding new column of data from loop

Say I have a loop running how would I create a new variable that holds the columns I want say.

for ....
        v= %some code that ouputs a 1 row 10 column data set say [1;2;3;4;5;...10]
    x=v % x adds v as the first column.
         %  Then adds v again on the second loop run as the 2nd column then adds v again for the 3rd column
end

%so something like x=v, x=vv, x=vvv  it keeps adding a new column to x of the data produced by v

I hope you can help. Thank you.

[KALYAN ACHARJYA]

Here 1 row 10 column data set say [1;2;3;4;5;...10];, Example is is 10 rows,1 column?

Which are you looking for?

Answer 1

[meghannmarie]

x = nan(10,num_loops);
for n = 1:num_loops
    v = %some code that ouputs a 1 row 10 column data set say [1;2;3;4;5;...10]
    x(:,n) = v; % x adds v as the first column.
end

Answer 2

[the cyclist]

x = zeros(10,3);
for i = 1:3
    v = rand(10,1);
    x(:,i) = v;
end