how to create a dft function without using other functions of matlab

how to create a discrete fourier transform function with out using other functions of matlab please help regarding this sir.

[Jan]

This is not possible: You cannot fo anything meaningful in Matlab without using builtin functions. So please explain exactly what you want.

If this is a homework, post what you have tried so far and ask a specific question.

[Naga Sai]

so use built functions sir with out using sytem tool boxes functions

[Stephen23]

fft, ifft, and fftw are part of basic MATLAB.

[Naga Sai]

sir i got the code sir

    function Xk = dft(xn,N)
%To compute the dft of the sequence x(n)
L = length(xn);
%Check for the length of the DFT
if(N<L)
    error('Length of DFT should be greater than the input sequence');
end
x1 = [xn zeros(1,N-L)];%Zero padding to the input sequence and assigning the value to the other vector
%Twiddle factors
for n=0:1:N-1;
for k=0:1:N-1;
p = exp(2*pi*-j*n*k/N);
x2(k+1,n+1) = p;
end
end
Xk=x1*x2;

Answer 1

[Subhash Mardi]

N=input('enter the sequence'); Y=input('enter the order of sequence'); for n=0:1:N-1; for k=0:1:N-1; p = exp(2*pi*-j*n*k/N); x2(k+1,n+1) = p; end end Xk=x1*x2;