probably not the most elegant, but this seems to work:
x = [.55, .4, .05, .5, .9]
num = 0
val = .9
for y=1:length(x)
if(num<val)
num = num+x(i)
else
y = y-1;
break
end
end
y
the value of why at the end will give you the result you are looking for
