How do I create a vector of n consecutive numbers spaced at with an interval of m between each group, without using a for loop?

Is it possible to generate the following vector:

v=[1,2,3 ,6,7,8 ,11,12,13 ....]

without using a for loop? More generally, I would like to be able to generate groups of n consecutive numbers with an interval of m between each group (in the example n=3 and m=2).

Thank you in advance..

Answer 1

[Guillaume]

numconsecutive = 3;  %let's use better names than n, m, etc.
groupspacing = 2;
numgroups = 5;

v = reshape((1:numconsecutive)' + (0:numgroups-1)*(numconsecutive+groupspacing), 1, [])

This requires R2016b or later

[Seb Long]

Thank you so much!

Answer 2

[Honglei Chen]

Here is one possible solution

N = 9;
n = 3;
m = 2;
x = buffer(1:N,n);
x = x+(0:size(x,2)-1)*m;
x(1:N).'

HTH

[Seb Long]

Many thanks for your answer! This works fine but I accepted the answer above as it runs faster. Thanks again..