Create a Doubling Series

I am trying to use Matlab to create a series in which each term is the double of the previous term (ie. 1*2=2, 2*2=4, 4*2=8 etc.), but I can't find an effective way to do this. Any tips?

[Graham Bamford]

How would you do this starting with any given number? i.e. starting with 250 and getting 500, 1000, 2000, 4000, 8000, etc...

Answer 1

[Star Strider]

Choose ‘limit’ to be whatever you want:

limit = 10;
Out = 2.^[1:limit];
fprintf(1, [repmat('%6d',1,limit) '\n' repmat('%6d',1,limit) '\n'], [[1:limit]; Out]')

       1     2     3     4     5     6     7     8     9    10
       2     4     8    16    32    64   128   256   512  1024

[Graham Bamford]

How would you do this starting with any given number? i.e. starting with 250 and getting 500, 1000, 2000, 4000, 8000, etc...

[Star Strider]

Graham Bamford —

Try this:

Out = 250 * 2 .^ (0:6)

producing:

Out =
         250         500        1000        2000        4000        8000       16000

.