How to execute once a different times loop in MATLAB?

Hello! Could anyone help me correct my loop operation. I want it to be executed for all the values of different times resulting in a matrix form values. However, it only shows me just the values of a first column instead of all columns.

t_i=0;
t_f=0.1;
a=0;
b=1;
dx=0.1;
dt=0.00001;
n=(t_f-t_i)/dt;
m=(b-a)/dx;
x=a:dx:b;
t=t_i:dt:t_f;

for i=1:m
    TT(i,1) = exp((1-cos(pi*x(i)))/pi);
end 

Phi1=zeros(m,1);
phi1=zeros(m,1);
u2=zeros(m,1);
Phi1=TT(:,end);

for i=1:m %for phi=-2*ln(Phi)
    phi1(i,1)= log(Phi1(i,1));
end

for i=1:m %for u=(phi)x
    if i==1
       % phi(1,1)= phi(2,1); %forward difference BC
       u2(i,1)= (phi1(i+1)-phi1(i))/(dx);
    else if i==m
            % phi(m +1,1)= phi(m,1); %backward difference BC
            u2(i,1)= (phi1(i)-phi1(i-1))/(dx);
        else
       u2(i,1)= (phi1(i+1)-phi1(i-1))/(2*dx);
        end
    end
end

[KSSV]

You have notused t any where in the code.....you have defined and it is unused.