MATLAB: How to overcome an invalid use of operator error

Question

Hello, I am trying to populate a 60×6 matrix with random values for different variables (force, torque, radius, etc) as its columns. Each of the variables must iterate 60 times and fall between a given range. I attempted to make a column vector for each variable and implement them into the matrix, however I am receiving an error when doing so.

Pop=ones(60,6);
F=ones(60,1);
P=ones(60,1);
T=ones(60,1);
r=ones(60,1);
t=ones(60,1);
 range of values
x=1;
while x<61
    F(x)=99000.*rand(60,1)+1000;
    P(x)=999000.*rand(60,1)+1000;
    T(x)=4990.*rand(60,1)+10;
    r(x)=0.04.*rand(60,1)+0.05;
    t(x)=0.0008.*rand(60,1)+0.0001;
    Pop=(:,1)= F(60,1);
    Pop=(:,2)= P(60,1);
    Pop=(:,3)= T(60,1);
    Pop=(:,4)= r(60,1);
    Pop=(:,5)= t(60,1);
    x=x+1
end

Answer 1

for i = 1:60
    F=99000.*rand(60,1)+1000;
    P=999000.*rand(60,1)+1000;
    T=4990.*rand(60,1)+10;
    r=0.04.*rand(60,1)+0.05;
    t=0.0008.*rand(60,1)+0.0001;
    pop = [F P T r t]
end