*CUPLOT* has a set of Fourier Transform commands.
The transform is stored in temporary arrays.
You can store the inverse transform into a frame/curve slot, after applying
optional notch or band pass filters.
You can also store the phase and/or amplitude into a slot.
Only the data with the *x* window is transformed.

**FF**- takes the fourier transform of the data.
The result is stored in a temporary array and can only be viewed using
the
`FP`command. **FP**- plots the frequency and magnitude.
`Command[ ]?`__SH 45436__`Command[ ]?`__DE DYF-6810-1 ;__`Command[ ]?`__R__!read the data`Command[ ]?`__FF__!transform the data`Frame[F1C1]?`__F1__`Command[ ]?`__FP__!plot the transform **FR**- windows the transform plot on the frequency range.
**FY**- windows the transform plot on the amplitude range.
**FN**- notches a frequency range of the transform.
**FB**- sets a frequency range bandpass.
**FU**- stores the inverse transform back as a data element. This
clears the transform array.
`Command[ ]?`__FF F1__!transform F1`Command[ ]?`__FN 395 405__!notch out freq 395 to 405`Command[ ]?`__FU__`Frame to store inverse transform[F1C1]?`__F2__ **FO**- sets or clears the flag to remove the linear (
`DC`) offset when storing the inverse with the`FC`command. **FS**- stores the phase or amplitude as a data element.
`Command[ ]?`__FF F1__!transform F1`Command[ ]?`__FS__`Store Phase or Amplitude[A]?`__A__`Frame/curve[F1C1]?`__F2__ **FC**- correlates two frames, f * g.
**FV**- convolves for response function, f / g.
**F2**- plots the amplitute and phase of g.
**FH**- gives a list of the Fourier transform commands.

Fri Jul 11 12:49:48 EDT 1997