Submatrixes with different rows

Hi all

i have a certain matrix 45x5, i want to neatly cut this matrix in submatrixes (or maybe group into cells) with different rows (a1,a2,a3); how can i do that? So the submatrixes will go from:

1) 1----a1 (a1 rows)

2)a1+1----n1 (a2 rows)

3)n1+1-----n2(a3 rows)

Thank you for the help!!

Regards!!

[Stephen23]

"i have a certain matrix 45x5, i want to neatly cut this matrix in submatrixes..."

Probably with one of these:

https://www.mathworks.com/help/matlab/ref/num2cell.html

https://www.mathworks.com/help/matlab/ref/mat2cell.html

[EldaEbrithil]

Thank you very much!! it was very simple xD