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testdfft.out
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1989-08-18
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Testing DoubleFFTServer (Double Precision FFT Server)
**************************************
a:
1.00000 0.86603 0.50000 0.00000 -0.50000
-0.86603 -1.00000 -0.86603 -0.50000 0.00000
0.50000 0.86603
a2:
0.00000 0.86603 0.86603 0.00000 -0.86603
-0.86603 0.00000 0.86603 0.86603 0.00000
-0.86603 -0.86603
asum:
1.00000 1.73205 1.36603 0.00000 -1.36603
-1.73205 -1.00000 0.00000 0.36603 0.00000
-0.36603 0.00000
**************************************
Checking transforms of pure signals.
Transform of a:
( 0.00000, 0.00000)( 0.50000, 0.00000)( 0.00000, 0.00000)( 0.00000, 0.00000)
( 0.00000, 0.00000)( 0.00000, 0.00000)( 0.00000, 0.00000)
Transform of a2:
( 0.00000, 0.00000)( 0.00000, 0.00000)( 0.00000, -0.50000)( 0.00000, 0.00000)
( 0.00000, 0.00000)( 0.00000, 0.00000)( 0.00000, 0.00000)
Transform of asum:
( 0.00000, 0.00000)( 0.50000, 0.00000)( 0.00000, -0.50000)( 0.00000, 0.00000)
( 0.00000, 0.00000)( 0.00000, 0.00000)( 0.00000, 0.00000)
**************************************
Checking Parseval's theorem.
Original variance: 1
Spectral variance: 1
**************************************
Checking transform of linear ramp.
Original series:
0.00000 1.00000 2.00000 3.00000 4.00000
5.00000 6.00000 7.00000 8.00000 9.00000
10.00000 11.00000
Its transform:
( 5.50000, 0.00000)(-0.50000, 1.86603)(-0.50000, 0.86603)(-0.50000, 0.50000)
(-0.50000, 0.28868)(-0.50000, 0.13397)(-0.50000, 0.00000)
Checking Parseval's theorem for ramp.
Original variance: 11.9167
Final variance: 11.9167
Back transform:
0.00000 1.00000 2.00000 3.00000 4.00000
5.00000 6.00000 7.00000 8.00000 9.00000
10.00000 11.00000
**************************************
Checking Nyquist.
Original sequence:
1.00000 -1.00000 1.00000 -1.00000 1.00000
-1.00000 1.00000 -1.00000 1.00000 -1.00000
1.00000 -1.00000
Its transform:
( 0.00000, 0.00000)( 0.00000, 0.00000)( 0.00000, 0.00000)( 0.00000, 0.00000)
( 0.00000, 0.00000)( 0.00000, 0.00000)( 1.00000, 0.00000)
Back transform:
1.00000 -1.00000 1.00000 -1.00000 1.00000
-1.00000 1.00000 -1.00000 1.00000 -1.00000
1.00000 -1.00000
**************************************