>> s=repmat([1:5],6,1)
s =
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
>> x1=rand(6,1)
x1 =
0.2785
0.5469
0.9575
0.9649
0.1576
0.9706
>> S=cumsum(s,2)
S =
1 3 6 10 15
1 3 6 10 15
1 3 6 10 15
1 3 6 10 15
1 3 6 10 15
1 3 6 10 15
>> x=[x1 repmat(x1,1,4)+S(:,2:end)]
x =
0.2785 3.2785 6.2785 10.2785 15.2785
0.5469 3.5469 6.5469 10.5469 15.5469
0.9575 3.9575 6.9575 10.9575 15.9575
0.9649 3.9649 6.9649 10.9649 15.9649
0.1576 3.1576 6.1576 10.1576 15.1576
0.9706 3.9706 6.9706 10.9706 15.9706
>>