The first column represents the number of sampled points.
The second and third columns represent the real and imaginary outputs.
This is the Discrete Fourier Transform of the input sequence listed in coeff.dat.

k 		 XR(k) 		 XI(k) 

0 	 4.000000 	 0.000000 
1 	 -2.414214 	 -1.000000 
2 	 0.000000 	 0.000000 
3 	 0.414214 	 1.000000 
4 	 0.000000 	 0.000000 
5 	 0.414214 	 -1.000000 
6 	 0.000000 	 0.000000 
7 	 -2.414214 	 1.000000

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