Simplifying Matlab Programming: Need Help with Iterating for xtotal Value

[tactical]

Programming in matlab. I have everything entered correctly, I just need help with iterating.
The program is similar to the following:

for i=0.1:0.99
calculates x1
for j=0.1:0.99
calculates x2
for k=0.1:0.99
calculates x3
for q=0.1:0.99
calculates x4
end
end
end
end
xtotal=x1*x2*x3*x4

I want to display all xtotal value, but the catch is I need i+j+k+q=1.
So for example i=.20,j=.25,k=.40,q=.15

TIA

 

[Wrichik Basu]

It's not quite clear, but do you want to calculate the value of x1, x2, x3 and x4 at the instant when i+j+k+q=1? In that case, use nested for-loops.

for i=0.1:0.01:0.99
    for j=0.1:0.01:0.99
        for k=0.1:0.01:0.99
            for q=0.1:0.01:0.99
                if (i + j + k + q == 1)
                    %calculate x1, x2, x3, x4
                    %calculate xtotal
                end
            end
        end
    end
end

But let me warn you beforehand that the time complexity of your code will significantly increase due to the four nested loops.