how to convert cell to array

I have 1 x 7 cell. Each cell has 20000 x 1 array. How do I take 1st column and 3rd 4th 5 7 7 column ? So result becomes 20000 x 5 array ?

Answer 1

[Azzi Abdelmalek]

If v is your cell array

out=cell2mat(v([1 3 4 5 7 ]))

Answer 2

[Jan]

out = cat(2, v{[1 3 4 5 7]});