mat lab codeing

hai i have probelm that like this
i have 4 arrays say a1,a2,a3,a4 of size say
a1=[1 1 1 1 1 1 1 1] 1X8
a1=[1 1 1 1 1 1 1 1] 1X8
a1=[1 1 1 1 1 1 1 1]1X8
a1=[1 1 1 1 1 1 1 1]1X8
i need to call these using
for loop for generating different combinations is it possible how to do it.