How to use "for" function for looping with 3 variables

Hello, I want to ask about how to use "for" function for calculating each iteration with 3 different variables. I want to calculate Wheston Bridge using different 3 variables. Here my code. Thank you

R1 = 100;

R2 = [200 : 1 : 300];

R3 = [250 : 1 : 350];

R4 = [300 : 1 : 400];

Vin = 10;

kk = 1;

for i = 1:length(R2)

for j = 1:length(R3)

for k = 1:length(R4)

Rs(kk) = (R2(i)./(R2(i)+R1))-(R4(k)./(R3(j)+R4(k)));

Vo(kk) = Vin*((R2(i)./(R2(i)+R1))-(R4(k)./(R3(j)+R4(k))));

kk = kk +1;

end

end

end

Answer 1

[David Hill]

No need of for-loops:

[a,b,c]=meshgrid(R2,R3,R4);
Rs = a./(a+R1)-c./(b+c);
Vo = Vin*Rs;

[Ericka Huang]

thank you very much for your help.... I can use this for my script