swap.m

matlab实现fft,以及ifft算法,包含蝶型运算等文件

function ndata=swap(data,N)
temp1 =zeros(1,N/2);
temp2=temp1;
ii=2;
n=1;
while ii<=N
    temp2(n)= data(ii);
    ii=ii+2;
    n=n+1;
end
 ii=1;
 n=1;
while ii<=N
 temp1(n)=data(ii);
 ii=ii+2;
 n=n+1;
end
ndata=[temp1,temp2];