sum up each column of my loop matlab

for i=[0:1:30000];
    R=[poissrnd(0.0000407430680),poissrnd(0.000472626),poissrnd(0.002497495),poissrnd(0.996989136)];
end

How can I get matlab to sum up each value of the R vector for all 30,000 simulations.

once its found the values from 1:i:30,000 I want it to add all the values in the first column, then all values in the second column, etc and have the result in one vector

[mabdorab]

sorry and just to add, if I wanted to find out where the values in columnSums came from how would I do this, so I know which iteration it came from. I am doing a forecast for nuber of claims and knowing where the counts came from may be required in my analysis.

Thanks in advance

[Geoff Hayes]

columnSums is an array of the sums of each column of R....where R is an array of Poisson random numbers for 30000 iteration. Please clarify your question because it isn't clear what you are asking.

Answer 1

[Geoff Hayes]

mabdorab - it sounds like you want to create a 30000x4 array of Poisson random numbers. Try presizing your R and then update each row as you iterate over k. For example,

 n = 30000;
 R = zeros(n,4);
 for k=1:n
    R(k,:) = [poissrnd(0.0000407430680),poissrnd(0.000472626),poissrnd(0.002497495),poissrnd(0.996989136)];
 end

Then you can use sum to sum your columns as

 columnSums = sum(R);

[mabdorab]

perfect thank you so much.

What would I do if I wanted the columnSums first value to be called A, second value B, third value C, fourth value D, and had them result seperatley?

really appreciate the fast response, my project is due in 2 days.

[Geoff Hayes]

Do you mean that you want to create a table? For example,

 array2table(columnSums, 'VariableNames',{'A','B','C','D'});