EDU x = [1,2,3,4,5,6,7,8]
EDU fft(x,8)
ans =
 36.00000000000000                     
-4.00000000000000 + 9.65685424949238i
-4.00000000000000 + 4.00000000000000i 
-4.00000000000000 + 1.65685424949238i
-4.00000000000000                     
-4.00000000000000 - 1.65685424949238i
-4.00000000000000 - 4.00000000000000i 
-4.00000000000000 - 9.65685424949238i

