NMRPipe Processing Functions
FSH: Frequency Shift via Inverse Fourier Transform.

FSH applies a circularshift to the points in each vector from the current dimension of the data. The shift is performed by inversetransforming a data vector, applying a firstorder phase correction, and transforming the data back to its original domain. This method can be used to shift data by a fractional number of points.
OPTIONS
rs rsVal
Specifies the number of points for the shift. If the number is
positive, the data will be shifted to the right. If it is negative,
the data will be shifted to the left.
This value can also be specified with spectral units (% Hz ppm).
ls lsVal
Specifies the number of points for the shift. If the number is
positive, the data will be shifted to the left. If it is negative,
the data will be shifted to the right.
This value can also be specified with spectral units (% Hz ppm).
sw
If this flag is used with
frequencydomain data, the chemical shift calibration
information is updated (NDORIG and NDCENTER).