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The documentation for the current release is also available on this site.
NAG Library Manual, Mark 27.1
Interfaces:  FL   CL   CPP   AD 
NAG FL Interface Introduction
Example description
 C06PAF Example Program Results

 Components of discrete Fourier transform

           Real      Imag

     0   2.48361   0.00000
     1  -0.26599   0.53090
     2  -0.25768   0.20298
     3  -0.25636   0.05806
     4  -0.25636  -0.05806
     5  -0.25768  -0.20298
     6  -0.26599  -0.53090

 Original sequence as restored by inverse transform

         Original  Restored

     0   0.34907   0.34907
     1   0.54890   0.54890
     2   0.74776   0.74776
     3   0.94459   0.94459
     4   1.13850   1.13850
     5   1.32850   1.32850
     6   1.51370   1.51370