How to find the index of array that reach to an specific value

Hi everyone I have an array like this :

Columns 1 through 9

0 0 2 4 4 5 5 5 5

Columns 10 through 18

5 4 5 5 2 3 6 5 5

Columns 19 through 27

4 4 2 10 3 6 4 5 5

Column 28

2

and I want to calculate when in this array sum of how many of this element reaches to 10 and we can see in index 5 it reaches 10 then A = 5*T

I use cumsum for it and it gives me answer in first step

but again I don't know how to calculate the continue I mean that I want to calculate when again after index 5 the sum of element reach to 10 .

can anyone help me with it

[Torsten]

I use cumsum for it and it gives me answer in first step

but again I don't know how to calculate the continue I mean that I want to calculate when again after index 5 the sum of element reach to 10

Then look up when cumsum reaches 20.

[the cyclist]

@arash rad, suppose when you reach a value of at least 10, you actually get the value 14 (not exactly 10). Do you want to include that "extra" 4 as you sum toward 20, or start over from 0 for the next sum?

Answer 1

[Image Analyst]

How about this:

v = randi(9, 1, 20)

v = 1×20

8 5 5 4 2 3 7 5 5 5 6 2 6 6 3 7 1 8 3 9

c = cumsum(v)

c = 1×20

8 13 18 22 24 27 34 39 44 49 55 57 63 69 72 79 80 88 91 100

thresholds = 10 : 10 : 10*length(c)

thresholds = 1×20

10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200

for k = 1 : length(c)
    t = find(c >= thresholds(k), 1, 'first');
    if ~isempty(t)
        indexes(k) = t;
    end
end
% Show indexes
indexes

indexes = 1×10

2 4 7 9 11 13 15 17 19 20

% Show cumulative sums at those indexes.
cumValues = c(indexes)

cumValues = 1×10

13 22 34 44 55 63 72 80 91 100

If it's not what you want, explain in detail why it's not.