How to set a force equal to one value over a range of theta and another value for the other range of theta?

for i=1:1:length(theta2)
    if (0<=i && i<180)
        F=[100,0];
    elseif (180<=i && i<=360)
        F=[-2000,0];      
    end
    

end

Answer 1

[Askic V]

theta = linspace(0,360);
force = zeros(size(theta));
force (theta >= 0 & theta < 180) = 100;
force(theta >= 180 & theta <= 360) = -2000;

plot(theta, force);