Padding zeros to Existing Data

When my loaded data is a 86x14 Matrix I would like to model it to be a 90x14 where the 4 newly added rows are all zeros.. Is this possible? Without tampering with the 86x14 data.

I just need to fill them up so that an error does not pop up when my other computations go on...

Answer 1

[Azzi Abdelmalek]

A=rand(86,14) % Example 
A(end+1:90,:)=0