How to write a code in Matlab having two conditions?

how to create rectangle filter with following condition;

f(t)= 1; -0.1secs< t < 0.1 secs

f(t)= 0; otherwise

Below i have tried but getting error.

n=2048;  %samples
fs=1024; %sampling frequency
T=1/fs;
t = (0:n-1)*T;
F=zeros(length(t));

for i=0:length(t)
    if t(i)<=0.1
        F(i)=1;
    else
        F(i)=0;
    end
end

Array indices must be positive integers or logical values.

[Samson David Puthenpeedika]

Understood.Thankyou so much .

Answer 1

[Dave B]

In MATLAB indices start with 1:

n=2048;  %samples
fs=1024; %sampling frequency
T=1/fs;
t = (0:n-1)*T;
F=zeros(length(t));
for i=1:length(t)
    if abs(t(i))<=0.1  % technically better because it covers the negative case
        F(i)=1;
    else
        F(i)=0; % not really needed because you initialized F with all zeros...
    end
end

But note, you don't need a loop for this kind of thing:

F2=zeros(length(t));
F2(abs(t)<=.1)=1;
isequal(F2,F)

ans = logical
   1