how to store values into array/matrix with different number of rows and only one column

Hi, how i want to store values from loop which has only 1 cols but may have different numbers rows.

For example, in 1st loop the result is

1
2

Meanwhile 2nd loop the results is

1
2
3

Thus, i want to store it as:

1 1
2 2
0 3

Is it possible? Since within the loop...the row can be any numbers.

Answer 1

[Rik]

It is best to pre-allocate your output array as close to the size you think you need, because extending a matrix hurts performance substantially.

cols=2;
est_rows=5;%estimate of the largest number of rows
result=zeros(est_rows,cols);keep_rows=0;
for col=1:2
    if col==1    ,part_result=(1:2).';
    elseif col==2,part_result=(1:3).';
    end
    
    keep_rows=max(keep_rows,numel(part_result));
    result(1:numel(part_result),col)=part_result;
end
result((keep_rows+1):end,:)=[];%will only crop unused rows
result

result = 3×2

1 1 2 2 0 3

[Khairul Nur]

Tq for the code and idea...edit it to fit mine..and its working great..tq rik!