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Description:
This subroutine modifies the supplied array of
Fourier co-efficients (as produced by NAG subroutine C06FAE) so that an inverse FFT can be
performed on them using FFTPACK routine KPG1_RFFTB. The resulting inverse will have the same
normalisation as the original data transformed using KPG1_RFFTF.
This function is equivalent to PDA_NAG2R except that it uses work space for greater speed.
Invocation
CALL KPG1_NAG2R( NP, R, WORK )
Arguments
NP = INTEGER (Given)
The size of
the array.
R( NP ) = REAL (Given and Returned)
The array holding the Fourier co-efficients.
Supplied in NAG format and returned in FFTPACK format.
WORK( NP ) = REAL (Given and
Returned)
Work space.
Notes:
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