idft.m

来自「这是一个 York大学开发的FDTD代码。很好用的工具」· M 代码 · 共 15 行

function v = idft(t,c,k)
%function v = idft(t,c,K)
%Inverse dft with arbitrary time step to construct waveform from Fourier series
% returns a vector corresponding to points in t
%idft (t,c,K)
% t=time (row vector)
% c=coefficients from -K to +K row vector
% k= range (e.g. -K to K) used for coeffs


exps=exp(2*pi*j*k'*t);
v=c*exps;

end