How can I generate a vector like this 1,2,2,3,3,3,4,4,4,4 by using for loop?

Hi all,

There's a problem that asks to generate a vector like 1,2,2,3,3,3,4,4,4,4

So if the input n = 5, then the output = [1,2,2,3,3,3,4,4,4,4,5,5,5,5,5]

I tried to solve it by using for loop

but I couldn't find a way to do this

function y = your_fcn_name(n)
L = length((n^2+n)/2)
for i = 1:L
   
end

I don't know what should I do inside the for loop, I tried to get the relation between the value and its index in the vector, but I couldn't

can you help me solve this problem with a for loop?

[DGM]

That's not what length() is for. Just use

L = (n^2 + n)/2;

[Nourhan]

Thanks !

[Stephen23]

Not an answer to this question, but perhaps useful to someone:

n = 5;
v = repelem(1:n,1:n)

v = 1×15

1 2 2 3 3 3 4 4 4 4 5 5 5 5 5

Answer 1

[Torsten]

Start with y = [] and in each step of the for-loop running from 1 to n, concatenate y and i*ones(1,i).