Here are four ways you can make a vector x that contains integers from 1 to 10.
x = [];
for i = 1:10
x(end+1) = i;
end
x = [];
for i = 1:10
x(i) = i;
end
x = zeros(1,10);
for i = 1:10
x(i) = i;
end
x = 1:10;
One or the other may be better for your purpose, depending on how your variables are set up before you need to build this vector and depending on whether there's any conditional logic necessary (e.g., only compute the daily average if at least 1 shot was attempted or whatever).
