shift values in an array systematically

Hi

I have an array of say 1 x 320. Now after each multiple of 40, I want to include 7 times a number 11, and then continue with the next 40 entries of the original array and so on. As an illustration: array(1:40) would be as before, array(41:47) would contain 11s now, and array(48:67) would contain what was previously in array(41:60), and so on, for all multiples of 40. How can I do that most efficiently? Thanks

Answer 1

[Jos (10584)]

Here is one way:

x = 1:320 ; 
dp = 40 ;
v11 = repmat(11,1,7) ;
c = arrayfun(@(k) [x(k:min(k+39,end)) v11], 1:dp:numel(x), 'un',0) ; 
out = cat(2, c{:})

[Pegah Kassraian Fard]

works, many thanks!