How divide a large matrix into smaller matrix using loop and save them separately .

Hi,

I have a large matrix let say (10x500). I want to divide that big matrix into 5 (10x100) matrix. Actually I have to subtract some value after each 100 coulmn. Can any body help me.

Thanks in advance.

[James Tursa]

What is the ultimate goal? To have separate matrices? Or to have different values subtracted from portions of your matrix?