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

20 次查看（过去 30 天）

Naga Sai 2017-5-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/341513-how-to-create-a-dft-function-without-using-other-functions-of-matlab

回答： Subhash Mardi 2018-8-23

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

4 个评论
显示 2更早的评论隐藏 2更早的评论

Stephen23 2017-5-23

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

Naga Sai 2017-5-31

在 MATLAB Online 中打开

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;

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Subhash Mardi 2018-8-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/341513-how-to-create-a-dft-function-without-using-other-functions-of-matlab#answer_333813

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;