How to create a sequence.

I need to create a vector that holds a sequence. In the sequence the previous number is multiplied by 2. The sequence could stop at a desired number lets say 256 (but it could be a bigger number). How would one go about this?

Example sequnce = 2,4,8,16,32,...,256. vector = [2;4;8;16;32;64;128;256]

vector =

     2
     4
     8
    16
    32
    64
   128
   256

Answer 1

[Sean de Wolski]

v = 2.^(1:8).'

[Sandie Nhatien Vu]

Hi, i have a question.. How do i create that sequence using a for-loop? It should range:

2 4 8 16 32 64 128 256 512 1024 that is i = 1:10

[Sean de Wolski]

for ii = 10
  v = 2.^(1:ii).'
end

[Stephen23]

@Sean de Wolski: that made me choke on my water with laughter... it really does fulfill the requirement perfectly, this wins the "best intentional misuse of a for-loop" prize.

[Sandie Nhatien Vu]

Thanks a lot!

[Simon Siu]

how to you know that!!!!!!!!!!!!!!!?????

Answer 2

[Morm My]

thank you very much sir.