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|Home MathPack Fourier Properties ImagSpec|
|See also: RealSpec, FourSerSinCoeff, PowerSpec, ImagMax, ImagMin, FData|
The array property ImagSpec provides access to the imaginary part of the spectrum. The index ix may assume values between 1 and SpectrumSize. Accessing any value of the array below 1 and above SpectrumSize will result in a zero value on read, or in no action on write.
Note: Since the index of the data buffer starts with 1 (and not 0), the index of the harmonics of the resulting Fourier spectrum is shifted by one. Thus the constant coefficient a0 is stored in ImagSpec, the first harmonic in ImagSpec, the second in ImagSpec, and so on.
The figure below shows the order of the frequency components as they are stored in ImagSpec after performing a Fourier transform: