how to show result in array

   % a=[1 2 3 4]; 
    a=[ 4 8 98 12 ];

s=0;

for i=1:3

s=s+s(i);
end 

k=[s]

i want my result be like this %k=[0 1 2 3]
 k=[0 4 8 98] 
how to do it?

Answer 1

[Azzi Abdelmalek]

a=[1 2 3 4]
k=a-1

[xxx]

but a=[ 4 8 98 12 ] and i want that k=[0 4 8 98] that solution can not be answer for this one ((

[Azzi Abdelmalek]

a=[ 4 8 98 12 ]
k=[0 a(1:end-1)]