How would you automate this code?

I have the following situation:

d = [3    39    54    53     6]; 

n = 103;

What I would like to do is to have a code where: when the sum of the elements in d is bigger than n, then I subtract one from the first column in d that is equal or bigger than n.

In the example above, I would have:

d = [3 39 54 *52* 6];

% since the first column where sum(d) is bigger than n is the fourth column, therefore I subtract 1 from 52

How can I automate this?

Thanks!

Answer 1

[Rik]

Th cumsum and find functions should be useful. Let me know if you have trouble implementing it.

[Armando MAROZZI]

Thanks a lot Rik! I made it, simple and elegant! I don't know why I always get loops first in my head

[Rik]

You're welcome.

Loops are an excellent first step. Matlab is good at optimizing code that is easy to interpret. Loops are the best choice if there isn't a direct function available. Using cellfun (except for the legacy syntax) or arrayfun only hides the loop and tends to have worse performance.

[Armando MAROZZI]

thanks for the tip!