MATLAB: How to send the MATLAB data(using loop) to excel??

excelsensitivity analysis

Hello. I have a touble.
I can send the MATLAB single data to excel. I studied it by this website.
But, if when the data value changes because of the loop statement,
and then how can I accumulate the all data??
For example, 
for i = 1:9
    A1 = randi([1 30]);
    A2 = randi([1 30]);
    A3 = randi([1 30]);
    i = i+1
end
According the loop runs, the value of A1, A2, A3 change.
I want to get an excel file like figure below, because I want to conduct sensitivity analysis by using the accumulated data.
If another method to conduct sensitivity analysis by MATLAB,
please, give me some advices.

Best Answer

rndMatrix = zeros(9, 4);             % preallocation
for i = 1:9
    rndMatrix(i, 1) = i;             % i
    rndMatrix(i, 2) = randi([1 30]); % A1
    rndMatrix(i, 3) = randi([1 30]); % A2
    rndMatrix(i, 4) = randi([1 30]); % A3
end
Now, rndMAtrix contains all data.
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