combining specific elements in an array

I have a array containing 9 element, now I want combine every three columns into one so at final I have an array of three elements. can any body help me.

initial_array = [16, 29, 0.599, 16, 30, 0.297, 16,33, 0.178]

final_array=[1629.599, 1630.297, 1633.178]

Answer 1

[Stephen Cobeldick]

Assuming that the number of digits is always the same....

Method one: reshape and matrix multiply:

>> V = [16, 29, 0.599, 16, 30, 0.297, 16, 33, 0.178];
>> Z = [100,1,1]*reshape(V,3,[])
Z =
   1629.599000000000   1630.297000000000   1633.178000000000

Method two: indexing:

>> Z = 100*V(1:3:end) + V(2:3:end) + V(3:3:end)
Z =
   1629.599000000000   1630.297000000000   1633.178000000000

[Muhammad Haziq]

Thanks for replying it solve my problem.