MATLAB: Reset value in cumsum matrix when reachin limit, and move the value to another matrix

cumsumlimit

Hello
can someone please help me with this challenge.
matrix
B = [1, 4, 3, 1, 3, 2, 1, 0, 0, 1, 5, 6, 9, 1, 3] % B is Input Matrix
A = cumsum (B);
A = [1, 5, 8, 9, 12, 14, 15, 15, 15, 16, 21, 27, 36, 37, 40] % A is output Matrix, which cumulates values in Vector B
C = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] % B is also Output, initial with zero in all vallues.
Then i want A and C to act like this
A = [1, 0, 3, 4, 0, 2, 3, 3, 3, 4, 0, 0, 0, 1, 3] % Every time it exceds 5, the value has to be moved to C, and restart the accumulation from 0
C = [0, 5, 0, 0, 7, 0, 0, 0, 0, 0, 9, 6, 9, 0, 0]

Best Answer

First interpretation
I believe the OP wants to integrate over B but not allow the cumulative sum to exceed a threshold of 5. So "A" would be a vector not exceeding 5 while "C" would be a vector of 0s except for the values in "A" that were closest to 5. 
% Example data
B = [1, 4, 3, 1, 3, 2, 1, 0, 0, 1, 5, 6, 9, 1, 3]; 
maxVal = 5;   % <-- set the threshold here
% Take the cumulative sum and convert it so that it doesn't exceed the 'maxVal'
A = cumsum(B); 
m = (0:maxVal:max(A))'; 
rm = (max(cumsum((A-m)>0))-1) .* maxVal;  %amount to remove
% Here's your new A vector
Anew = A-rm; 
% Here's your C vector
C = zeros(size(Anew)); 
C(diff(Anew) < 0) = Anew(diff(Anew) < 0);
Results
Anew =
     1     5     3     4     2     4     5     5     5     1     1     2     1     2     5
C =
     0     5     0     4     0     0     0     0     5     0     0     2     0     0     0
Second interpretation
(as described futher by OP in the comments below).
B = [1, 4, 3, 1, 3, 2, 1, 0, 0, 1, 5, 6, 9, 1, 3];
A = cumsum (B);
C = zeros(size(A)); 
for i = 1:length(A)
    if A(i) >= 5
        C(i) = A(i); 
        A(i:end) = A(i:end)-A(i); 
    end       
end
Results
A =
     1     0     3     4     0     2     3     3     3     4     0     0     0     1     4
C =
     0     5     0     0     7     0     0     0     0     0     9     6     9     0     0
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